Species (Hyla crucifer) of tree frog found in ponds, marshes, and other damp areas in the U.S. During the breeding season it can be found in woodland ponds; at other times it is seldom seen. It has a high, whistling call and is one of the first frogs to vocalize in spring. It is tiny (only 0.75–1.3 in. or 2–3.5 cm, long) and grayish, tan, or olive-brown, with an X-shaped or irregular brown mark on its back.
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There are two subspecies of the spring peeper, the Northern (P. c. crucifer) and the Southern spring peeper (P. c. bartramiana). The Northern is similar to the Southern except for a strong dark marking on the Southern frog's belly. The Southern P. c. bartramiana is limited to northern Florida and southern Georgia, while the northern can be found all over the eastern USA and eastern Canada.
When Do Peepers Peep? Climate and the Date of First Calling in the Spring Peeper (Pseudacris Crucifer) in Southeastern New York State
Apr 01, 2013; Abstract - The date of first calling (DFC) of Pseudacris crucifer (Spring Peeper) was recorded over 15 years between 1997 and...
SPRING PEEPER'S SONGS ARE WORTH A LISTEN EARLY WARNING SIGNS OF A DECLINE IN THE AMPHIBIAN'S POPULATION ARE REASON ENOUGH TO TAKE NOTICE.(Front)
May 18, 2000; It's not spring, really, until you hear the chirping song of spring peepers in a greening marsh. I remember the difficult April...