The blue mockingbird (''Melanotis caerulescens'') is a species of

bird Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a fou ...

in the family Mimidae. It is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

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 ...

, but has occurred as a vagrant in the southern

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

. Its natural

habitat In ecology, habitat refers to the array of resources, biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species' habitat can be seen as the physical manifestation of its ...

s are subtropical or tropical dry

forest A forest is an ecosystem characterized by a dense ecological community, community of trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, ...

s, subtropical or tropical moist

montane forest Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures lapse rate, fall as elevation increases, causing the ecosystem to stratify. This stratification is ...

s, and heavily degraded former forest. The blue mockingbird is uniformly blue on its back, tail, wings, head and underbelly. This color is a result of feather structure rather than pigment, and therefore can look gray in the shade. It has a black "mask" surrounding its reddish-brown eyes. It has a rather long, slightly graduated tail, and dark blue streaks over its breast. Its bill is long, thin and slightly curved, and its legs and feet are black.

Taxonomy

When he first described the blue mockingbird in 1827,

William Swainson William Swainson Fellow of the Linnean Society, FLS, Fellow of the Royal Society, FRS (8 October 1789 – 6 December 1855), was an English ornithologist, Malacology, malacologist, Conchology, conchologist, entomologist and artist. Life Swains ...

assigned it to the

mockingbird Mockingbirds are a group of New World passerine birds from the family (biology), family Mimidae. They are best known for the habit of some species Mimicry, mimicking the songs of other birds and the sounds of insects and amphibians, often loudly ...

'' ''Orpheus'', and when ''Orpheus'' became a

junior synonym In taxonomy, the scientific classification of living organisms, a synonym is an alternative scientific name for the accepted scientific name of a taxon. The botanical and zoological codes of nomenclature treat the concept of synonymy differently. ...

for the genus ''

Mimus ''Mimus'' is a genus of passerine birds in the family (biology), family Mimidae. It contains the typical mockingbirds. Taxonomy The genus ''Mimus'' was introduced in 1826 by the German zoologist Friedrich Boie to contain a single species, ''Turd ...

'', the species was moved accordingly. Not all authorities agreed; several placed it in the

thrush Thrush may refer to: Birds * Thrush (bird), any of the birds in the family Turdidae ** List of thrush species * Antthrushes, the Formicariidae family of birds * Dohrn's warbler, or Dohrn's thrush-babbler, a species ''Sylvia dohrni'' in the famil ...

'' ''

Turdus ''Turdus'' is a genus of medium-sized mostly insectivorous or omnivorous birds in the wider thrush family, Turdidae. The genus name ''Turdus'' is Latin for 'thrush'. Most of the species are called thrushes; the term thrush is also used for man ...

''. However, when

Charles Lucien Bonaparte Charles Lucien Jules Laurent Bonaparte, 2nd Prince of Canino and Musignano (24 May 1803 – 29 July 1857) was a French naturalist and ornithology, ornithologist, and a nephew of Napoleon. Lucien and his wife had twelve children, including Cardinal ...

moved it to its current genus '' Melanotis'' in 1850, most authorities quickly followed suit. There is disagreement as to whether it is

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 ...

or not. Among taxonomists who believe the species is polytypic, two subspecies are generally recognized. *''M. c. caerulescens'', the nominate subspecies, is found in the pine-oak zone of western Mexico, from southern Sonora south to the

Isthmus of Tehuantepec The Isthmus of Tehuantepec () is an isthmus in Mexico. It represents the shortest distance between the Gulf of Mexico and the Pacific Ocean. Before the opening of the Panama Canal, it was a major overland transport route known simply as the T ...

. *''M. c. longirostris'' is found only on the Tres Marías Islands, off the coast of western Mexico. The blue mockingbird has historically been considered

conspecific Biological specificity is the tendency of a characteristic such as a behavior or a biochemical variation to occur in a particular species. Biochemist Linus Pauling stated that "Biological specificity is the set of characteristics of living organism ...

with the closely related blue-and-white mockingbird. Its species name is derived from the

Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...

adjective ''caerǔlěus'', meaning "blue".

Description

Measuring in length, and weighing between , the blue mockingbird is a medium-sized

mimid __NOTOC__ The mimids are the New World family of passerine birds, Mimidae, that includes thrashers, mockingbirds, tremblers, and the New World catbirds. As their name (Latin for "mimic") suggests, these birds are notable for their vocalizatio ...

. Individuals of the subspecies ''caerulescens'' have a mean body mass slightly higher than that for individuals of the subspecies ''longirostris'' — for the former and for the latter.

Habitat and range

The blue mockingbird lives in a variety of woodlands: humid forest, riparian thickets, scrub, pine-oak forests and second growth. It is found at elevations ranging from lowlands to .

Behavior

Breeding

The blue mockingbird builds a

cup nest A bird nest is the spot in which a bird lays and incubates its eggs and raises its young. Although the term popularly refers to a specific structure made by the bird itself—such as the grassy cup nest of the American robin or Eurasian bl ...

of twigs and rootlets.

Food and feeding

The blue mockingbird is an

omnivore 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 t ...

; it feeds primarily on

invertebrate Invertebrates are animals that neither develop nor retain a vertebral column (commonly known as a ''spine'' or ''backbone''), which evolved from the notochord. It is a paraphyletic grouping including all animals excluding the chordata, chordate s ...

s, but also on some vegetable matter.

Conservation and threats

Because of its very large range and sizable population (estimated to number 500,000–4,999,999 individuals), the blue mockingbird is rated as a species of ''

least concern A least-concern species is a species that has been evaluated and categorized by the International Union for Conservation of Nature (IUCN) as not being a focus of wildlife conservation because the specific species is still plentiful in the wil ...

'' by the

International Union for Conservation of Nature The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the stat ...

. There is, however, evidence that its overall numbers are dropping, primarily due to

habitat fragmentation Habitat fragmentation describes the emergence of discontinuities (fragmentation) in an organism's preferred environment (habitat), causing population fragmentation and ecosystem decay. Causes of habitat fragmentation include geological proces ...

and loss. The Mexican government has named the ''longirostris'' subspecies as a taxon of "special concern".

References

External links

Blue Mockingbird near Douglas, Arizona

Blue Mockingbird Images Arizona / El Dorado Park in Long Beach, California
{{Taxonbar, from=Q1587047 blue mockingbird Birds of Mexico Endemic birds of Mexico blue mockingbird Taxonomy articles created by Polbot Birds of the Sierra Madre Occidental Birds of the Sierra Madre del Sur Taxa named by William Swainson