The last species of Anuran (frog) to breed in New York, from late May into July, is the gray treefrog (Dryophytes versicolor). The species overwinters in forests, where they spend most of their lives. They make their way to wetlands, where males call to attract mates. Females then deposit fertilized eggs on vegetation in the wetland. After breeding they will return to their forested haunts, and can be heard calling periodically throughout the summer.
Patterning and coloration are variable, but they are generally covered in ragged dark blotches over a gray to light green background. Gray treefrogs have a light spot bordered by a dark edge beneath the eye and bright yellow coloration on the inside surface of their thighs. Adults are 1.5-2 inches, and have toe pads that act as a suction cup for climbing.
Their call is an unmistakable, powerful trill that varies in length between individuals. To some, this call may be reminiscent of a raccoon, minus the random chatter. The call is so powerful, that to the human ear the pulse of their trill can be felt reverberating through the bones of the inner ear! Check out this video of a gray treefrog calling.
Photo by William Hoffman.