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The whooping crane (''Grus americana'') is an
endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching, inv ...
crane species, native to
North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...
, named for its "whooping" calls. Along with the
sandhill crane The sandhill crane (''Antigone canadensis'') is a species of large Crane (bird), cranes of North America and extreme northeastern Siberia. The common name of this bird refers to its habitat, such as the Platte River, on the edge of Nebraska's S ...
(''Antigone canadensis''), it is one of only two crane species native to North America, and it is also the tallest North American bird species, with an estimated 22–24 year life expectancy in the wild. After being pushed to the brink of extinction by unregulated hunting and loss of habitat that left just 21 wild (and two captive) cranes by 1941, the whooping crane made a partial recovery through conservation efforts. The total number of cranes in the surviving migratory population, plus three reintroduced flocks and in-captivity, only slightly exceeds 911 birds .


Taxonomy

The whooping crane was formally described in 1758 by the Swedish naturalist
Carl Linnaeus Carl Linnaeus (23 May 1707 – 10 January 1778), also known after ennoblement in 1761 as Carl von Linné,#Blunt, Blunt (2004), p. 171. was a Swedish biologist and physician who formalised binomial nomenclature, the modern system of naming o ...
in the tenth edition of his ''
Systema Naturae ' (originally in Latin written ' with the Orthographic ligature, ligature æ) is one of the major works of the Sweden, Swedish botanist, zoologist and physician Carl Linnaeus (1707–1778) and introduced the Linnaean taxonomy. Although the syste ...
''. He placed it with the herons and cranes in the
genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
'' Ardea'' and coined the
binomial name In taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, altho ...
''Ardea america''. Linnaeus based his account on those by two English naturalists. In 1729–1732
Mark Catesby Mark Catesby (24 March 1683 – 23 December 1749) was an English natural history, naturalist who studied the flora and fauna of the New World. Between 1729 and 1747, Catesby published his ''Natural History of Carolina, Florida and the Bahama ...
had described and illustrated the whooping crane in his ''The Natural History of Carolina, Florida and the Bahama Islands'', and in 1750 George Edwards had described and illustrated the crane using a preserved specimen that had been brought to London from the
Hudson Bay Hudson Bay, sometimes called Hudson's Bay (usually historically), is a large body of Saline water, saltwater in northeastern Canada with a surface area of . It is located north of Ontario, west of Quebec, northeast of Manitoba, and southeast o ...
area of northeast Canada by James Isham, an employee of the
Hudson's Bay Company The Hudson's Bay Company (HBC), originally the Governor and Company of Adventurers of England Trading Into Hudson’s Bay, is a Canadian holding company of department stores, and the oldest corporation in North America. It was the owner of the ...
. Linnaeus specified the type locality as North America but this has been restricted to the Hudson Bay. The whooping crane is now one of eight species placed in the genus '' Grus'' that was introduced in 1760 by the French zoologist
Mathurin Jacques Brisson Mathurin Jacques Brisson (; 30 April 1723 – 23 June 1806) was a French zoologist and natural philosophy, natural philosopher. Brisson was born on 30 April 1723 at Fontenay-le-Comte in the Vendée department of western France. Note that page 14 ...
. The species is considered to be
monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unisp ...
as no
subspecies In Taxonomy (biology), biological classification, subspecies (: subspecies) is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (Morphology (biology), morpholog ...
are recognised.


Description

An adult whooping crane is white with a red crown and a long, dark, pointed bill. However, immature whooping cranes are cinnamon brown. While in flight, their long necks are kept straight and their long dark legs trail behind. Adult whooping cranes' black wing tips are visible during flight. On average, the whooping crane is the fifth-largest extant species of crane in the world. Johnsgard, P. A. (1983). ''Cranes of the World''. Indiana University Press

/ref> Whooping cranes are the tallest bird native to North America and are anywhere from the third to the fifth heaviest species on the continent, depending on which figures are used. The species can reportedly stand anywhere from in height.Collar, J., Del Hoyo, J., Elliot, A., & Saragatal, J. (1996). ''Handbook of the birds of the World. Volume 3. Hoatzin to auks''. Lynx Edicions. Wingspan, at least typically, is from . Widely reported averages put males at a mean mass of , while females weigh on average (Erickson, 1976). However, one small sample of unsexed whooping cranes weighed on average. Typical weights of adults seem to be between . The body length, from the tip of the bill to the end of the tail, averages about . The standard linear measurements of the whooping cranes are a wing chord length of , an exposed Culmen (bird), culmen length of and a tarsus of . The only other very large, long-legged white birds in
North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...
are: the
great egret The great egret (''Ardea alba''), also known as the common egret, large egret, great white egret, or great white heron, is a large, widely distributed egret. The four subspecies are found in Asia, Africa, the Americas, and southern Europe. R ...
, which is over a foot (30 cm) shorter and one-seventh the weight of this crane; the great white heron, which is a morph of the
great blue heron The great blue heron (''Ardea herodias'') is a large wading bird in the heron family Ardeidae, common near the shores of open water and in wetlands over most of North and Central America, as well as far northwestern South America, the Caribbea ...
in Florida; and the wood stork. All three other birds are at least 30% smaller than the whooping crane. Herons and storks are also quite different in structure from the crane. Larger individuals (especially males of the larger races) of
sandhill crane The sandhill crane (''Antigone canadensis'') is a species of large Crane (bird), cranes of North America and extreme northeastern Siberia. The common name of this bird refers to its habitat, such as the Platte River, on the edge of Nebraska's S ...
can overlap in size with adult whooping cranes but are obviously distinct at once for their gray rather than white color. Their calls are loud and can carry several kilometers. They express "guard calls", apparently to warn their partner about any potential danger. A crane pair jointly calls rhythmically ("unison call") after waking in the early morning, after courtship, and when defending their territory. The first unison call ever recorded in the wild was taken in the whooping cranes' wintering area of the Aransas National Wildlife Refuge during December 1999.


Distribution and habitat

At one time, the range for the whooping crane extended throughout midwestern North America as well as southward to
Mexico Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...
. By the mid-20th century, the
muskeg Muskeg (; ; , lit. ''moss bog'') is a peat-forming ecosystem found in several northern climates, most commonly in Arctic and boreal ecosystem, boreal areas. Muskeg is approximately synonymous with bogland, bog or peatland, and is a standard te ...
of the
taiga Taiga or tayga ( ; , ), also known as boreal forest or snow forest, is a biome characterized by coniferous forests consisting mostly of pines, spruces, and larches. The taiga, or boreal forest, is the world's largest land biome. In North A ...
in Wood Buffalo National Park,
Alberta Alberta is a Provinces and territories of Canada, province in Canada. It is a part of Western Canada and is one of the three Canadian Prairies, prairie provinces. Alberta is bordered by British Columbia to its west, Saskatchewan to its east, t ...
and
Northwest Territories The Northwest Territories is a federal Provinces and territories of Canada, territory of Canada. At a land area of approximately and a 2021 census population of 41,070, it is the second-largest and the most populous of Provinces and territorie ...
, Canada, and the surrounding area had become the last remnant of the former nesting habitat of the Whooping Crane Summer Range. However, with the recent Whooping Crane Eastern Partnership Reintroduction Project, whooping cranes nested naturally for the first time in 100 years in the
Necedah National Wildlife Refuge Necedah National Wildlife Refuge is a National Wildlife Refuge located in northern Juneau County, Wisconsin near the village of Necedah. It was established in 1939 and is famous as the northern nesting site for reintroduction of an eastern U ...
in central
Wisconsin Wisconsin ( ) is a U.S. state, state in the Great Lakes region, Great Lakes region of the Upper Midwest of the United States. It borders Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michig ...
, United States, and these have subsequently expanded their summer range in Wisconsin and surrounding states, while reintroduced experimental non-migratory populations have nested in
Florida Florida ( ; ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders the Gulf of Mexico to the west, Alabama to the northwest, Georgia (U.S. state), Georgia to the north, the Atlantic ...
and
Louisiana Louisiana ( ; ; ) is a state in the Deep South and South Central regions of the United States. It borders Texas to the west, Arkansas to the north, and Mississippi to the east. Of the 50 U.S. states, it ranks 31st in area and 25 ...
. Whooping cranes nest on the ground, usually on a raised area in a marsh. The female lays 1 or 2 eggs, usually in late-April to mid-May. The blotchy, olive-coloured eggs average 2½ inches in breadth and 4 inches in length (60 by 100 mm), and weigh about . The incubation period is 29–31 days. Both parents brood the young, although the female is more likely to directly tend to the young. Usually no more than one young bird survives in a season. The parents often feed the young for 6–8 months after birth and the terminus of the offspring-parent relationship occurs after about 1 year. Breeding populations winter along the
Gulf A gulf is a large inlet from an ocean or their seas into a landmass, larger and typically (though not always) with a narrower opening than a bay (geography), bay. The term was used traditionally for large, highly indented navigable bodies of s ...
coast of
Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...
, United States, near Rockport on the Aransas National Wildlife Refuge and along Sunset Lake in Portland, Matagorda Island, Isla San Jose, and portions of the Lamar Peninsula and Welder Point, which is on the east side of San Antonio Bay. The
Salt Plains National Wildlife Refuge The Salt Plains National Wildlife Refuge is part of the United States system of national wildlife refuges. It is located in Alfalfa County, Oklahoma, Alfalfa County in northern Oklahoma, north of Jet, Oklahoma, Jet (pop. 230), along Great Salt P ...
in Oklahoma is a major migratory stopover for the crane population, hosting over 75% of the species annually. As many as nine whooping cranes were observed at various times on Granger Lake in Central Texas in the 2011/2012 winter season. Drought conditions in 2011 exposed much of the lake bed, creating ample feeding grounds for these cranes just as they were taking their autumn migration through Texas.


Predators

Their many potential nest and brood predators include the
American black bear The American black bear (''Ursus americanus''), or simply black bear, is a species of medium-sized bear which is Endemism, endemic to North America. It is the continent's smallest and most widely distributed bear species. It is an omnivore, with ...
,
wolverine The wolverine ( , ; ''Gulo gulo''), also called the carcajou or quickhatch (from East Cree, ''kwiihkwahaacheew''), is the largest land-dwelling species, member of the family Mustelidae. It is a muscular carnivore and a solitary animal. The w ...
,
gray wolf The wolf (''Canis lupus''; : wolves), also known as the grey wolf or gray wolf, is a canine native to Eurasia and North America. More than thirty subspecies of ''Canis lupus'' have been recognized, including the dog and dingo, though gr ...
,
cougar The cougar (''Puma concolor'') (, ''Help:Pronunciation respelling key, KOO-gər''), also called puma, mountain lion, catamount and panther is a large small cat native to the Americas. It inhabits North America, North, Central America, Cent ...
,
red fox The red fox (''Vulpes vulpes'') is the largest of the true foxes and one of the most widely distributed members of the order Carnivora, being present across the entire Northern Hemisphere including most of North America, Europe and Asia, plus ...
,
Canada lynx The Canada lynx (''Lynx canadensis'') or Canadian lynx is one of the four living species in the genus ''Lynx''. It is a medium-sized wild cat characterized by long, dense fur, triangular ears with black tufts at the tips, and broad, snowshoe- ...
,
bald eagle The bald eagle (''Haliaeetus leucocephalus'') is a bird of prey found in North America. A sea eagle, it has two known subspecies and forms a species pair with the white-tailed eagle (''Haliaeetus albicilla''), which occupies the same niche ...
, and
common raven The common raven or northern raven (''Corvus corax'') is a large all-black passerine bird. It is the most widely distributed of all Corvidae, corvids, found across the Northern Hemisphere. There are 11 accepted subspecies with little variatio ...
.
Golden eagle The golden eagle (''Aquila chrysaetos'') is a bird of prey living in the Northern Hemisphere. It is the most widely distributed species of eagle. Like all eagles, it belongs to the family Accipitridae. They are one of the best-known bird of pr ...
s have killed some young whooping cranes and fledglings. Due to their large size, adult birds in the wild have few predators. However, American alligators have taken a few whooping cranes in Florida, and the
bobcat The bobcat (''Lynx rufus''), also known as the wildcat, bay lynx, or red lynx, is one of the four extant species within the medium-sized wild cat genus '' Lynx''. Native to North America, it ranges from southern Canada through most of the c ...
has killed many captive-raised whooping cranes in Florida and Texas. In Florida, bobcats have caused the great majority of natural mortalities among whooping cranes, including several ambushed adults and the first chick documented to be born in the wild in 60 years. Adult cranes can usually deter or avoid attacks by medium-sized predators such as
coyote The coyote (''Canis latrans''), also known as the American jackal, prairie wolf, or brush wolf, is a species of canis, canine native to North America. It is smaller than its close relative, the Wolf, gray wolf, and slightly smaller than the c ...
s when aware of a predator's presence, but the captive-raised cranes haven't learned to roost in deep water, which makes them vulnerable to ambush. As they are less experienced, juvenile cranes may be notably more vulnerable to ambushes by bobcats. Patuxent Wildlife Research Center scientists believe that this is due to an overpopulation of bobcats caused by the absence or decrease in larger predators (the endangered
Florida panther The Florida panther is a North American cougar (''P. c. couguar'') population in South Florida. It lives in pinelands, tropical hardwood hammocks and mixed freshwater swamp forests. Its range includes the Big Cypress National Preserve, Everglade ...
and the extirpated
red wolf The red wolf (''Canis rufus'') is a Canis, canine native to the southeastern United States. Its size is intermediate between the coyote (''Canis latrans'') and Wolf, gray wolf (''Canis lupus''). The red wolf's taxonomic classification as being ...
) that formerly preyed on bobcats. At least 12 bobcats have been trapped and relocated in an attempt to save the cranes.


Diet

These birds forage while walking in shallow water or in fields, sometimes probing with their bills. They are
omnivorous An omnivore () is an animal that regularly consumes significant quantities of both plant and animal matter. Obtaining energy and nutrients from plant and animal matter, omnivores digest carbohydrates, protein, fat, and fiber, and metabolize ...
but tend to be more inclined to animal material than most other cranes. Only the
red-crowned crane The red-crowned crane (''Grus japonensis''), also called the Manchurian crane (; the Chinese character '丹' means 'red', '頂/顶' means 'crown (anatomy), crown' and '鶴/鹤' means 'crane'), is a large East Asian Crane (bird), crane among the ...
may have a more carnivorous diet among living cranes. In their
Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...
wintering grounds, this species feeds on various
crustacean Crustaceans (from Latin meaning: "those with shells" or "crusted ones") are invertebrate animals that constitute one group of arthropods that are traditionally a part of the subphylum Crustacea (), a large, diverse group of mainly aquatic arthrop ...
s,
mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000  extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...
s,
grasshopper Grasshoppers are a group of insects belonging to the suborder Caelifera. They are amongst what are possibly the most ancient living groups of chewing herbivorous insects, dating back to the early Triassic around 250 million years ago. Grassh ...
s,
fish A fish (: fish or fishes) is an aquatic animal, aquatic, Anamniotes, anamniotic, gill-bearing vertebrate animal with swimming fish fin, fins and craniate, a hard skull, but lacking limb (anatomy), limbs with digit (anatomy), digits. Fish can ...
(such as eel), small
reptile Reptiles, as commonly defined, are a group of tetrapods with an ectothermic metabolism and Amniotic egg, amniotic development. Living traditional reptiles comprise four Order (biology), orders: Testudines, Crocodilia, Squamata, and Rhynchocepha ...
s (such as
snake Snakes are elongated limbless reptiles of the suborder Serpentes (). Cladistically squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales much like other members of the group. Many species of snakes have s ...
s),
mice A mouse (: mice) is a small rodent. Characteristically, mice are known to have a pointed snout, small rounded ears, a body-length scaly tail, and a high breeding rate. The best known mouse species is the common house mouse (''Mus musculus' ...
,
vole Voles are small rodents that are relatives of lemmings and hamsters, but with a stouter body; a longer, hairy tail; a slightly rounder head; smaller eyes and ears; and differently formed molars (high-crowned with angular cusps instead of lo ...
s, aquatic
plant Plants are the eukaryotes that form the Kingdom (biology), kingdom Plantae; they are predominantly Photosynthesis, photosynthetic. This means that they obtain their energy from sunlight, using chloroplasts derived from endosymbiosis with c ...
s,
acorn The acorn is the nut (fruit), nut of the oaks and their close relatives (genera ''Quercus'', ''Notholithocarpus'' and ''Lithocarpus'', in the family Fagaceae). It usually contains a seedling surrounded by two cotyledons (seedling leaves), en ...
s and fruits (such as wolfberry 'Lycium carolinianum''">Lycium_carolinianum.html" ;"title="'Lycium carolinianum">'Lycium carolinianum''. Potential foods of breeding birds in summer include frogs, snakes, small rodents, small birds, fish (such as minnows), aquatic insects, crayfish, clams, snails, aquatic tubers, and berries. Six studies from 1946 to 2005 have reported that blue crabs (''
Callinectes sapidus ''Callinectes sapidus'' (from the Ancient Greek language, Ancient Greek ,"beautiful" + , "swimmer", and Latin , "savory"), the blue crab, Atlantic blue crab, or, regionally, the Maryland blue crab, is a species of crab native to the waters of t ...
'') are a significant food source for whooping cranes wintering at Aransas National Wildlife Refuge, constituting up to 90 percent of their energy intake in two winters; 1992–93 and 1993–94. Waste
grain A grain is a small, hard, dry fruit (caryopsis) – with or without an attached husk, hull layer – harvested for human or animal consumption. A grain crop is a grain-producing plant. The two main types of commercial grain crops are cereals and ...
, including
wheat Wheat is a group of wild and crop domestication, domesticated Poaceae, grasses of the genus ''Triticum'' (). They are Agriculture, cultivated for their cereal grains, which are staple foods around the world. Well-known Taxonomy of wheat, whe ...
,
barley Barley (), a member of the grass family, is a major cereal grain grown in temperate climates globally. It was one of the first cultivated grains; it was domesticated in the Fertile Crescent around 9000 BC, giving it nonshattering spikele ...
, and
corn Maize (; ''Zea mays''), also known as corn in North American English, is a tall stout Poaceae, grass that produces cereal grain. It was domesticated by indigenous peoples of Mexico, indigenous peoples in southern Mexico about 9,000 years ago ...
, is an important food for migrating whooping cranes, but they do not swallow gizzard stones; they digest grain less efficiently than sandhill cranes.


Individual recognition, territorial and partnership fidelity

In earlier years, whooping crane chicks were caught and banded in the breeding areas of Wood Buffalo National Park. Although this delivered valuable insight into individual life history and behaviour, it has been discontinued due to risks to the cranes and the people involved. By recording guard and unison calls followed by frequency analysis of the recording, a "voiceprint" of the individual crane (and of pairs) can be generated and compared over time. This technique was developed by B. Wessling and applied in the Aransas National Wildlife Refuge and also partially in the breeding grounds in Canada over five years. It delivered interesting results, i.e. that besides a certain fraction of stable pairs with strong affinity to their territories, there is a big fraction of cranes who change partners and territories. Only one of the exciting results was to identify the "Lobstick" male when he still had his band; he later lost his band and was recognized by frequency analysis of his voice and then was confirmed to be over 26 years old and still productive.


Conservation efforts

Whooping cranes are believed to have been naturally rare, and major population declines caused by habitat destruction and overhunting led them to become critically
endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching, inv ...
. Even with hunting bans, illegal hunting has continued in spite of potential substantial financial penalties and possible prison time."Endangered whooping crane shot and killed" "Animal Planet", 14 December 200

The population went from an estimated 10,000+ birds before the settling of Europeans on the continent to 1,300-1,400 birds by 1870. By 1938 there were just 15 adults in a single migratory flock, plus about thirteen additional birds living in a non-migratory population in Louisiana, but the latter were scattered by a 1940 hurricane that killed half of them, while the survivors never again reproduced in the wild. In the early 1960s, Robert Porter Allen, an ornithologist with the
National Audubon Society The National Audubon Society (Audubon; ) is an American non-profit environmental organization dedicated to conservation of birds and their habitats. Located in the United States and incorporated in 1905, Audubon is one of the oldest of such orga ...
, appeared as a guest challenger on the network television show ''
To Tell The Truth ''To Tell the Truth'' is an American television panel show. Four celebrity panelists are presented with three contestants (the "team of challengers", each an individual or pair) and must identify which is the "central character" whose unusual ...
'', which gave the Conservation movement some opportunity to update the public on their efforts to save the whooping crane from extinction. His initial efforts focused on public education, particularly among farmers and hunters. Beginning in 1961, the Whooping Crane Conservation Association (WCCA), was established to improve the status of the whooping cranes. This non-profit organization functioned largely by influencing federal, state and provincial political decisions and educating the general public about the critical status of the bird. The whooping crane was declared endangered in 1967. Allen had begun an effort at captive breeding with a female crane named 'Josephine', the sole survivor of the Louisiana population, injured and taken into captivity in 1940, and two successive injured birds from the migratory population, 'Pete' and 'Crip', at the Audubon Zoo and the Aransas refuge. Josephine and Crip produced the first whooping crane born in captivity in 1950, but this chick only lived four days, and though decades of further efforts produced more than 50 eggs before Josephine's death in 1965, only four chicks survived to adulthood and none of them bred. At the same time, the wild population was not thriving. In spite of the efforts of conservationists, hunting bans, and educational programs, the aging wild population would gain only 10 birds in the first 25 years of monitoring, with entire years passing without a single new juvenile joining those that returned to the Texas wintering grounds. This led to a renewed tension between those who favored efforts to preserve the wild population and others seeing a captive breeding program as the only hope for whooping crane survival, even though it must depend on individuals withdrawn from the extremely-vulnerable wild population. Identification of the location of the summer breeding grounds of the whooping cranes at Wood Buffalo National Park in 1954 allowed more detailed study of their reproductive habits in the wild, and led to the observation that while many breeding pairs laid two eggs, rearing efforts seemed to favor a single chick, and both chicks would almost never survive to fledge. It was concluded that the removal of a single egg from a two-egg clutch should still leave a single hatchling most likely to survive, while providing an individual for captive breeding. Such removals in alternating years showed no decline in the reproductive success of the wild cranes. The withdrawn eggs were transferred to the Patuxent Wildlife Research Center in
Maryland Maryland ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic region of the United States. It borders the states of Virginia to its south, West Virginia to its west, Pennsylvania to its north, and Delaware to its east ...
, where approaches for hatching and rearing crane chicks in captivity had already been optimized using the more-numerous
sandhill crane The sandhill crane (''Antigone canadensis'') is a species of large Crane (bird), cranes of North America and extreme northeastern Siberia. The common name of this bird refers to its habitat, such as the Platte River, on the edge of Nebraska's S ...
s. Initial challenges getting the resultant birds to reproduce, even using
artificial insemination Artificial insemination is the deliberate introduction of sperm into a female's cervix or uterine cavity for the purpose of achieving a pregnancy through in vivo fertilization by means other than sexual intercourse. It is a fertility treatment ...
approaches, would give impetus to the first, unsuccessful attempt at reintroduction, by swapping whooping crane eggs into the nests of the more numerous sandhill cranes as a way to establish a backup population. In 1976, with the wild population numbering only 60 birds and having increased at an average of only one bird per year over the past decades, ornithologist George W. Archibald, co-founder of the International Crane Foundation in Baraboo, Wisconsin, began working with 'Tex', a female whooping crane hatched at the San Antonio Zoo in 1967 to Crip and his new mate, the wild-captured 'Rosie', to get her to lay a fertile egg through artificial insemination. Archibald pioneered several techniques to rear cranes in captivity, including the use of crane costumes by human handlers. Archibald spent three years with Tex, acting as a male crane – walking, calling, dancing – to shift her into reproductive condition. As Archibald recounted the tale on ''
The Tonight Show ''The Tonight Show'' is an American late-night talk show that has been broadcast on NBC since 1954. The program has been hosted by six comedians: Steve Allen (1954–1957), Jack Paar (1957–1962), Johnny Carson (1962–1992), Jay Leno (1992–2 ...
'' in 1982, he stunned the audience and host
Johnny Carson John William Carson (October 23, 1925 – January 23, 2005) was an American television host, comedian, and writer best known as the host of NBC's ''The Tonight Show Starring Johnny Carson'' (1962–1992). Carson is a cultural phenomenon and w ...
with the sad end of the story – the death of Tex shortly after the hatching of her one and only chick, named 'Gee Whiz'. Gee Whiz was successfully raised and mated with female whooping cranes. The techniques pioneered at Patuxent, the International Crane Foundation, and a program at the
Calgary Zoo The Wilder Institute/Calgary Zoo is located in Bridgeland, Calgary, Bridgeland, Calgary, Alberta, Canada, just east of the city's Downtown Calgary, downtown and adjacent to the Inglewood, Calgary, Inglewood and Downtown East Village, Calgary, Ea ...
would give rise to a robust multi-institutional captive breeding program that would supply the cranes used in several additional captive breeding and reintroduction programs. A single male crane, 'Canus', rescued in 1964 as an injured wild chick and taken to Patuxent in 1966, would by the time of his 2003 death be the sire, grandsire or great-grandsire of 186 captive-bred whooping cranes. In 2017, the decision was made for the Patuxent Wildlife Research Center to end its 51-year effort to breed and train whooping cranes for release, due to changing priorities and in the face of budget cuts by the Trump administration. Their flock of 75 birds was moved in 2018 to join captive breeding programs at zoos or private foundations, including the Calgary Zoo, the International Crane Foundation, the Audubon Species Survival Center in Louisiana, and other sites in Florida, Nebraska, Oklahoma and Texas. This relocation is expected to negatively impact the reproductive success of the captive cranes, at least in the short term, and concerns were raised over its impact on the reintroduction efforts for which the Patuxent program had been providing birds. Meanwhile, the wild crane population began a steady increase, such that in 2007 the Canadian Wildlife Service counted 266 birds at Wood Buffalo National Park, with 73 mating pairs that produced 80 chicks, 39 of which completed the fall migration, while a
United States Fish and Wildlife Service The United States Fish and Wildlife Service (USFWS or FWS) is a List of federal agencies in the United States, U.S. federal government agency within the United States Department of the Interior which oversees the management of fish, wildlife, ...
count in early 2017 estimated that 505 whooping cranes, including 49 juveniles, had arrived at Aransas National Wildlife Refuge that season. As of 2020, there were an estimated 677 birds living in the wild, in the remnant original migratory population as well as three reintroduced populations, while 177 birds were at the time held in captivity at 17 institutions in Canada and the United States, putting the total population at over 800. The wild cranes winter in marshy areas along the Gulf Coast in and surrounding the Aransas National Wildlife Refuge. An environmental group, The Aransas Project, has sued the Texas Commission on Environmental Quality (TCEQ), maintaining that the agency violated the
Endangered Species Act The Endangered Species Act of 1973 (ESA; 16 U.S.C. § 1531 et seq.) is the primary law in the United States for protecting and conserving imperiled species. Designed to protect critically imperiled species from extinction as a "consequence of e ...
by failing to ensure adequate water supplies for the birds' range. The group attributes the deaths of nearly two dozen whooping cranes in the winter of 2008 and 2009 to inadequate flows from the San Antonio and Guadalupe rivers.Texas Water Report: Going Deeper for the Solution
Texas Comptroller of Public Accounts. Retrieved February 10, 2014
In March 2013 during continuing
drought A drought is a period of drier-than-normal conditions.Douville, H., K. Raghavan, J. Renwick, R.P. Allan, P.A. Arias, M. Barlow, R. Cerezo-Mota, A. Cherchi, T.Y. Gan, J. Gergis, D.  Jiang, A.  Khan, W.  Pokam Mba, D.  Rosenfeld, J. Tierney, ...
conditions, a federal court ordered TCEQ to develop a habitat protection plan for the crane and to cease issuing permits for waters from the San Antonio and Guadalupe rivers. A judge amended the ruling to allow TCEQ to continue issuing permits necessary to protect the public's health and safety. An appeals court eventually granted a stay in the order during the appeals process. The Guadalupe-Blanco and San Antonio river authorities joined TCEQ in the lawsuit, warning that restricting the use of their waters would have serious effects on the cities of New Braunfels and San Marcos as well as major industrial users along the coast. To address the potential of future crowding that may result from the increasing migratory population, in 2012 and following years, purchases of small plots of land and acquisition of conservation easements covering larger areas has led to the protection of tens of thousands of additional acres of potential coastal habitat near the Aransas reserve. A large purchase of over 17,000 acres in 2014 was paid for with $35 million made available from the settlement over the ''Deepwater Horizon'' oil spill and an additional $15 million raised by a Texas parks non-profit. Concerns have been raised over the effects of climate change on the migratory cycle of the surviving wild population. The cranes arrive on their nesting grounds in April and May to breed and begin their nesting. When young whooping cranes are ready to leave the nest, they depart in September and follow the migratory trail through Texas.


Reintroduction

Several attempts have been made to establish other breeding populations outside of captivity. * The first project, carried out by the United States Fish and Wildlife Service and the Canadian Wildlife Service and initiated in 1975, involved cross-fostering second eggs from the wild population in the nests of sandhill cranes to establish a second self-sustaining flock using a flyway from Idaho across Utah to New Mexico. The 289 transplanted eggs resulted in 85 chicks that learned to migrate, but the whooping cranes failed to mate with other whooping cranes due to imprinting on their sandhill foster parents. The project was discontinued in 1989, and no members of this population survived. The initiation of this effort and the problem of imprinting are explored in the 1976 documentary ''A Great White Bird''. * A second effort involved the establishment of a non-migratory population near
Kissimmee, Florida Kissimmee ( ) is the largest city and county seat of Osceola County, Florida, Osceola County, Florida, United States. As of the 2020 United States census, 2020 census, the population was 79,226. It is a principal city of the Greater Orlando, O ...
, by a cooperative effort led by the U.S. and Canadian Whooping Crane Recovery Team in 1993. A total of 289 captive-bred birds provided by the International Crane Foundation were released in the wild between 1993 and 2004. Though in 2003 the population had produced the first chick conceived in the wild to reintroduced cranes, a decision was made in 2005 to release no further birds into the population until problems with high mortality and poor reproductive success were resolved. Studies of the population were discontinued in 2012. The population numbered about 50 adults and 4 chicks in October 2006 but subsequently dwindled to just 14 cranes in March 2018. The Fish and Wildlife Service proposed a plan to relocate the surviving Kissimmee crane population to join the newer Louisiana reintroduced non-migratory flock, and due to the lack of available mates, two Florida birds were moved to Louisiana in February 2019, including the mother of the first wild-born chick. As of 2020, there were just 9 birds remaining in the Florida population, with another relocated to Louisiana in 2021. * A third attempt has involved reintroducing the whooping crane to a new flyway established east of the Mississippi river, with its southern end just west of the Atlantic flyway. This project used isolation rearing of young whooping cranes and trained them to follow
ultralight aircraft Ultralight aviation (called microlight aviation in some countries) is the flying of lightweight, 1- or 2-seat fixed-wing aircraft. Some countries differentiate between weight-shift control and Aircraft flight control system, conventional three-a ...
, a method of re-establishing migration routes pioneered by Bill Lishman and Joe Duff working with
Canada geese The Canada goose (''Branta canadensis''), sometimes called Canadian goose, is a large species of goose with a black head and neck, white cheeks, white under its chin, and a brown body. It is native to the arctic and temperate regions of North ...
. The ultralight flights were managed by a non-profit organization, Operation Migration, working with the larger Whooping Crane Eastern Partnership (WCEP), which oversees all aspects of the reintroduced Eastern Migratory Population. Subsequent to hatching, the Operation Migration cranes were taught to follow the ultralight, fledged over their future breeding territory in Wisconsin, and led by the aircraft on their first migration from Wisconsin to Florida. Having learned the migratory route, they then returned north on their own the following spring. With the growth of this reintroduced population, WCEP also began releasing captive-reared juvenile cranes directly into the flock to learn migratory behavior from their peers, in a process referred to as Direct Autumn Release (DAR). :This reintroduction began in fall 2001 and added birds to the population in subsequent years. Two whooping crane chicks were hatched in the wild from one nest in 2006, to parents that had been part of the first ultralight-led release in 2002, and one of these survived to successfully migrate with her parents to Florida. In early February, 2007, 17 yearlings in a group of 18 were killed by the
2007 Central Florida tornadoes The 2007 Groundhog Day tornado outbreak was a localized but devastating tornado event that took place in central Florida early on February 2, 2007. Early morning temperatures had risen well above average for the season; combined with increased ...
, with the sole survivor dying in late April an unknown cause, possibly related to the storm trauma. Two of the four DAR chicks from 2006 were also lost due to predation. In spite of this, as of May, 2011, there were 105 surviving whooping cranes in the Eastern Migratory Population (EMP), including 17 that had formed pairs, several of which are nesting and are incubating eggs. :In December 2011, the Operation Migration escort of nine cranes was interrupted by the
Federal Aviation Administration The Federal Aviation Administration (FAA) is a Federal government of the United States, U.S. federal government agency within the United States Department of Transportation, U.S. Department of Transportation that regulates civil aviation in t ...
due to a regulation prohibiting paid pilots of ultralight aircraft. After a month with the cranes kept in a pen, the FAA finally granted a one-time exemption to allow completion of the migration. In January 2016, citing the near-total failure of the hand-raised and guided birds to reproduce in the wild, the Fish and Wildlife Service made a decision to discontinue the ultralight program in favor of alternatives with reduced human interaction. In June 2018, the size of this population was estimated at 102 birds. This number had dropped to 86 birds in 2020. * Due to the vulnerability and low reproductive success of the Florida non-migratory population, a new effort was made to establish a non-migratory population in Louisiana's White Lake Wetlands Conservation Area, the home of the historical non-migratory population of whooping cranes. This is a cooperative effort of the US Fish and Wildlife Service, the
US Geological Survey The United States Geological Survey (USGS), founded as the Geological Survey, is an agency of the U.S. Department of the Interior whose work spans the disciplines of biology, geography, geology, and hydrology. The agency was founded on March ...
, the
Louisiana Department of Wildlife and Fisheries The Louisiana Department of Wildlife and Fisheries (LDWF) is a state agency of Louisiana that maintains state wildlife and fishery areas. The agency is headquartered in the capital city of Baton Rouge. Mission The Louisiana Department of Wildlife ...
, the Louisiana Cooperative Fish and Wildlife Research Unit at
LSU Louisiana State University and Agricultural and Mechanical College, commonly referred to as Louisiana State University (LSU), is an American Public university, public Land-grant university, land-grant research university in Baton Rouge, Louis ...
, and the International Crane Foundation. In March 2011, 10 cranes were released, but all but three had been lost by the time a second group of 16 were released in December. Subsequent annual cohorts followed, ranging in size from 10 to 27 birds. In 2019, the population began receiving birds relocated from the failed Florida reintroduction effort with the arrival of a 21-year old reintroduced female and her wild-born 4-year-old daughter, followed by the transfer of a juvenile female in 2021. :The flock has established a range centered on southwestern Louisiana but also including central and northeastern Louisiana and east Texas, with an occasional stray found more broadly. None of the first released group survived to full maturity, but in the Spring of 2014 the second cohort of birds began to form pairs and nest, producing the population's first eggs, although since the parents were still juveniles these eggs were infertile. The next year saw fertile eggs but none survived to hatching. However, in April 2016 a pair of reintroduced cranes hatched two chicks, one of which survived to fledge, represented the first in the wild in Louisiana since 1939. Starting in 2017, a novel strategy was introduced: eggs in the process of hatching, taken from captive birds, were swapped into Louisiana nests in place of infertile eggs, allowing the chicks to be raised by substitute crane parents in the wild. In 2018, a combination of naturally-laid and substituted eggs added five wild-raised juveniles to the population, which all survived to fledge. As of August 2018, 125 birds had been released, with at least 65 surviving, while in 2020 following further releases, relocations from Florida, and several wild fledglings, there were 76 birds in this population. A major hurdle with some of these reintroduced populations has been deaths to illegal hunting. Over a period of two years, five of the approximately 100 whooping cranes in the Eastern Migratory Population were illegally shot and killed. One of the dead cranes was the female known as "First Mom". In 2006, she and her mate were the first eastern captive raised and released pair to successfully raise a chick to adulthood in the wild. This was a particular blow to that population because whooping cranes do not yet have an established successful breeding situation in the East. On March 30, 2011, Wade Bennett, 18, of Cayuga, Indiana and an unnamed juvenile pleaded guilty to killing First Mom. After killing the crane, the juvenile had posed holding up her body. Bennett and the juvenile were sentenced to a $1 fine, probation, and court fees of about $500, a penalty which was denounced by various conservation organizations as being too light. The prosecuting attorney has estimated that the cost of raising and introducing to the wild one whooping crane could be as much as $100,000. Overall, the International Crane Foundation estimates that the nearly 20% of deaths among the reintroduced cranes in the Eastern Migratory Population are due to shootings. Illegal shootings have accounted for an even larger proportion of mortality among the birds introduced into the Louisiana population, with about 10% of the first 147 released cranes being shot and killed. Two juveniles were apprehended for a 2011 incident, a Louisiana man was sentenced to 45 days imprisonment and a $2500 fine after pleading guilty to a killing in November 2014, and a Texas man was fined $25,000 for a January 2016 shooting and barred from possessing firearms during a 5-year probation period, on subsequent violation of which he was given an 11-month custodial sentence. On the other hand, a Louisiana man cited for a July 2018 shooting received probation, community service and hunting and fishing restrictions but no fine or firearms restriction. Two Louisiana juveniles were cited in 2018 for a May 2016 incident.


See also

* Puppet-rearing


References


Further reading


Natural History article by Paul Johnsgard (1982)

Whooping Crane (''Grus americana'')
from Paul Johnsgard, ''Cranes of the World'' (1983) * * McNulty, Faith, The Wildlife Stories of Faith McNulty, Chap. 6 "The Whooping Crane" (pages 121–309), Doubleday 1980 (Chap. 6 was originally published as a book of the same title by E.P. Dutton in 1966). Much of her account deals with the work of Robert Porter Allen. * * * *


External links

*ARKive - * Breeds whooping cranes for reintroduction projects and is a research center for all of the world's cranes. * Western Migatory Population, Whooping Crane Information {{Authority control
whooping crane The whooping crane (''Grus americana'') is an endangered Crane (bird), crane species, native to North America, named for its "whooping" calls. Along with the sandhill crane (''Antigone canadensis''), it is one of only two crane species native to ...
Birds of Canada Birds of the United States Birds of North America
whooping crane The whooping crane (''Grus americana'') is an endangered Crane (bird), crane species, native to North America, named for its "whooping" calls. Along with the sandhill crane (''Antigone canadensis''), it is one of only two crane species native to ...
ESA endangered species
whooping crane The whooping crane (''Grus americana'') is an endangered Crane (bird), crane species, native to North America, named for its "whooping" calls. Along with the sandhill crane (''Antigone canadensis''), it is one of only two crane species native to ...