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Illinois chorus frog
The Illinois chorus frog, ''Pseudacris illinoensis'', is a species of chorus frog that lives in scattered, restricted habitat ecosystems in the states of Arkansas, Illinois, and Missouri. It was published by Smith in 1951. Its lifecycle is little known, its isolated populations are increasingly restricted by agricultural drainage, and it is listed as a threatened subspecies.〔Jeanne Townsend Handy, "The Secret Life of the Illinois Chorus Frog", ''Outdoor Illinois'' XIX:3 (March 2011), pages 9-11.〕 It is often referred to as a subspecies of ''P. streckeri''. Collins 〔Collins, J. T. 1997. Standard common and current scientific names for North American amphibians and reptiles. Fourth edition. Herpetological Circular 25: 1–40.〕 recognized it as its own species which was followed by ASW6.0〔(【引用サイトリンク】title=Amphibian Species of the World 6.0 )〕 and Amphibiaweb〔(【引用サイトリンク】title=AmphibiaWeb )〕 on the basis of its diagnosability from Pseudacris streckeri and its allopatry. The IUCNredlist 2013.2 has not incorporated this taxonomic split.〔(【引用サイトリンク】title=IUCNredlist 2013.2 )〕
==Description==
The Illinois chorus frog, a wetland amphibian, grows to a maximum length of 1.5 inches (3.7 cm). Its range is restricted to isolated sandy wetlands along the banks of the Mississippi River and a major tributary, the Illinois River.〔
Its lifecycle begins with the mating season beginning in late February and continuing until late April, when the small amphibian signals its aptitude with a version of the distinctive cry that gives its genus its name. The breeding call can be heard at a distance of up to 1 mile (1.6 km). The pools of spring meltwater, where they live and eat, begin to dry up as early as mid-May, and the frogs disappear into hibernation below the winter frost line . With unusually strong forelegs for its size, the Illinois chorus frog is described as the only frog that uses a breast stroke motion to dig its sandy burrows.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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