The Atlantic Coast leopard frog (''Lithobates kauffeldi'') is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

amphibian Amphibians are ectothermic, anamniote, anamniotic, tetrapod, four-limbed vertebrate animals that constitute the class (biology), class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all Tetrapod, tetrapods, but excl ...

that is endemic to the United States. As a member of 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 ...

''Rana'' ''

sensu lato ''Sensu'' is a Latin word meaning "in the sense of". It is used in a number of fields including biology, geology, linguistics, semiotics, and law. Commonly it refers to how strictly or loosely an expression is used in describing any particular co ...

'', it is classified as a

true frog True frogs is the common name for the frog family (biology), family Ranidae. They have the widest distribution of any frog family. They are abundant throughout most of the world, occurring on all continents except Antarctica. The true frogs are p ...

, with typical smooth skin and a narrow waist. Its range stretches along the northern part of Eastern Seaboard, from

Connecticut Connecticut ( ) is a U.S. state, state in the New England region of the Northeastern United States. It borders Rhode Island to the east, Massachusetts to the north, New York (state), New York to the west, and Long Island Sound to the south. ...

North Carolina North Carolina ( ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, South Carolina to the south, Georgia (U.S. stat ...

. The species takes its common name from the speckles on its legs and back reminiscent of a

leopard The leopard (''Panthera pardus'') is one of the five extant cat species in the genus ''Panthera''. It has a pale yellowish to dark golden fur with dark spots grouped in rosettes. Its body is slender and muscular reaching a length of with a ...

pattern. It is one of several species classified as

leopard frog Leopard frog is a generic name used to refer to various species in the true frog genus Lithobates. They all have similar coloration: brown or green with spots that form a leopard pattern. They are distinguished by their distribution and behaviora ...

s, distinguished as unique through its

mating call A mating call is the auditory signal used by animals to attract mates. It can occur in males or females, but literature is abundantly favored toward researching mating calls in females. In addition, mating calls are often the subject of mate choi ...

, genetic differences, habitat, and morphological distinctions.

Etymology

The Atlantic Coast leopard frog is one of several species of leopard frogs. Its species name, ''kauffeldi'', is derived from the name of Staten Island herpetologist Carl Frederick Kauffeld, who in 1936 proposed that there could be a third species of leopard frog inhabiting the

New York metropolitan area The New York metropolitan area, also called the Tri-State area and sometimes referred to as Greater New York, is the List of cities by GDP, largest metropolitan economy in the world, with a List of U.S. metropolitan areas by GDP, gross metropo ...

, specifically Staten Island. The author team that described the species in 2014 christened it after Kauffeld in honor of him.

Distribution and range

''L. kauffeldi'' is found along the northeastern coast of the United States from central Connecticut to northeastern North Carolina. The north-south range is approximately 780 km long, and the width is about 100 km from the

Atlantic The Atlantic Ocean is the second largest of the world's five oceanic divisions, with an area of about . It covers approximately 17% of Earth's surface and about 24% of its water surface area. During the Age of Discovery, it was known for se ...

shoreline inward. The range narrows as it progressed southward, mostly along the I-95 corridor. The species is thought to inhabit ten states, but the entirety of its distribution and range is not known. It is thought to be

extirpated Local extinction, also extirpation, is the termination of a species (or other taxon) in a chosen geographic area of study, though it still exists elsewhere. Local extinctions are contrasted with global extinctions. Local extinctions mark a chan ...

from most of western

New York New York most commonly refers to: * New York (state), a state in the northeastern United States * New York City, the most populous city in the United States, located in the state of New York New York may also refer to: Places United Kingdom * ...

and

Long Island Long Island is a densely populated continental island in southeastern New York (state), New York state, extending into the Atlantic Ocean. It constitutes a significant share of the New York metropolitan area in both population and land are ...

. The Atlantic Coast leopard frog is thought to be

sympatric In biology, two closely related species or populations are considered sympatric when they exist in the same geographic area and thus frequently encounter each other. An initially interbreeding population that splits into two or more distinct spe ...

with both the

northern leopard frog ''Lithobates pipiens''Integrated Taxonomic Information System nternet2012''Lithobates pipiens'' pdated 2012 Sept; cited 2012 Dec 26Available from: www.itis.gov/ formerly ''Rana pipiens'', commonly known as the northern leopard frog, is a s ...

and the

southern leopard frog ''Lithobates sphenocephalus'' or ''Rana sphenocephala'', commonly known as the southern leopard frog, is a medium-sized anuran in the family Ranidae (the true frogs). The southern leopard frog is one of the 36 species currently or formerly classi ...

in the northern and southern parts of its range, respectively. For a time the species remained undiscovered because of its similarity to both of the aforementioned in physical appearance and habitat. A vector rendition of the range from Figure 1 of Feinberg et al. (2014) showing the range of the Atlantic Coast leopard frog side by side with the previously understood range for the northern and southern leopard frogs is shown

here Here may refer to: Music * ''Here'' (Adrian Belew album), 1994 * ''Here'' (Alicia Keys album), 2016 * ''Here'' (Cal Tjader album), 1979 * ''Here'' (Edward Sharpe album), 2012 * ''Here'' (Idina Menzel album), 2004 * ''Here'' (Merzbow album), ...

on Wikimedia Commons.

Characteristics

The frogs' coloring ranges from mint-gray to light olive green, and brown spots distribute irregularly across their backs and legs. Dark snout lines run along their heads. They have large eyes and strong legs used for leaping. Coloring has been observed to change between day and night as well as with the seasons, with many individuals taking nocturnal darker tones and diurnal lighter hues. Adult males have large vocal sacs on either side of the head which are used to produce a mating call. This call is a single and distinct "''chuck''" sound rather than the repeated "''ak-ak-ak''" of related species.

Breeding

The species breeds at a similar time of year as many other leopard frog species. The frogs commence migrations in February and March. As the air temperature rises in March and April, males begin consistent nocturnal choruses of mating calls, though both sustained diurnal and nocturnal choruses have been observed. They float in shallow water in groups of five or more and call to females. The advertisement call does not travel far, which may be a reason for dense groups. Breeding continues through spring and early summer, peaking in a two- to three-week period in late March and early April in

. Eggs are laid in clusters.

Habitat

''L. kauffeldi'' tends to inhabit large wetland areas, such as marshes,

wet meadow A wet meadow is a type of wetland with soils that are Solubility, saturated for part or all of the growing season which prevents the growth of trees and brush. Debate exists whether a wet meadow is a type of marsh or a completely separate type of ...

s, or slow-flowing water. Its habitat usually includes clear, shallow water. The species lives in or around open, vegetated spaces as well, with such plants as cattails, reeds, or river shrubs.

References

{{Taxonbar, from=Q18385290 Lithobates Endemic amphibians of the United States Amphibians described in 2014