''Pseudacris kalmi'', the New Jersey chorus frog, is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

frog A frog is any member of a diverse and largely Carnivore, carnivorous group of short-bodied, tailless amphibians composing the order (biology), order Anura (ανοὐρά, literally ''without tail'' in Ancient Greek). The oldest fossil "proto-f ...

in the treefrog family

Hylidae Hylidae is a wide-ranging family of frogs commonly referred to as "tree frogs and their allies". However, the hylids include a diversity of frog species, many of which do not live in trees, but are terrestrial or semiaquatic. Taxonomy and s ...

. It is found in the states near

New Jersey New Jersey is a state in the Mid-Atlantic and Northeastern regions of the United States. It is bordered on the north and east by the state of New York; on the east, southeast, and south by the Atlantic Ocean; on the west by the Delaware ...

in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

. It was first described as

subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...

of '' Pseudacris triseriata'' but it is differentiated by range and size.Conant, Roger and, Collins, John T., 1998, Peterson Field Guide: Reptiles and Amphibians, Eastern/Central North America, 616 pgs., Houghton Mifflin Company;, Boston This frog's color ranges from grey to tan or greenish brown with a dark stripe on both sides of the body that extends from the snout, through their eyes, and to the groin. It breeds in early spring from February to April. It broods in shallow bodies of water,Mitchell, Joseph C. and Karen K. Reay, 1999, Atlas of Amphibians and Reptiles in Virginia, Num. 1, 122 pgs., Virginia Department of Game and Inland Fisheries, Richmond, VA especially

vernal pool Vernal pools, also called vernal ponds or ephemeral pools, are seasonal pools of water that provide habitat for distinctive plants and animals. They are considered to be a distinctive type of wetland usually devoid of fish, and thus allow the safe ...

s, which dry up later in the season. The adult frog measures 19–36 mm in snout-vent length. It has one stripe that goes from over the mouth to under each eye and three thick stripes over its back from front to back. Sometimes the middle stripe is broken. In breeding seasons, the male frogs seek vernal pools. They sit in the water or on plants and sing for the females, who come to them. The female frog lays eggs on the stems of plants in shallow water. The eggs stick together in

groups A group is a number of persons or things that are located, gathered, or classed together. Groups of people * Cultural group, a group whose members share the same cultural identity * Ethnic group, a group whose members share the same ethnic iden ...

of 8 to 143. The tadpoles take about two months to become frogs. This frog's predators include water snakes, foxes, birds, raccoons, and such

arthropod Arthropods (, (gen. ποδός)) are invertebrate animals with an exoskeleton, a Segmentation (biology), segmented body, and paired jointed appendages. Arthropods form the phylum Arthropoda. They are distinguished by their jointed limbs and Arth ...

s as crayfish and spiders. Scientists named this frog ''kalmi'' for

Pehr Kalm Pehr Kalm (6 March 1716 – 16 November 1779), also known as Peter Kalm, was a Swedish explorer, botanist, naturalist, and agricultural economist. He was one of the most important apostles of Carl Linnaeus. In 1747, he was commissioned by the R ...

, also called Peter Kalm, a

Swedish Swedish or ' may refer to: Anything from or related to Sweden, a country in Northern Europe. Or, specifically: * Swedish language, a North Germanic language spoken primarily in Sweden and Finland ** Swedish alphabet, the official alphabet used by ...

traveler who wrote a book called ''Travels into North America'' in 1772. In that book, he discussed Niagara Falls, other natural features of the area, and the many frogs of New Jersey.

References

Chorus frogs Amphibians of the United States Endemic fauna of the United States Amphibians described in 1955 {{Hylidae-stub