Description: It closely resembles the Cope's gray treefrog (H. chrysoscelis) and can only be distinguished in the field by their call. The gray treefrog has twice as many chromosomes as the Cope's gray treefrog. This small frog has toe pads which enable it to climb shrubs and trees. 1 1/4 - 2 inches (3.2-5.1 cm) [in length]. [Color is] gray to creamy white. This frog can change colors, so it can be anything from a mottled grayish green or solid green to a gray or creamy white color. The inner thighs on the hind legs of all gray tree frogs are yellow. [They have] a musical, birdlike trill. The call is similar to the Cope's gray treefrog, but slower. They may call while perched in tree branches. (MN DNR, 2022)
Habitat: Breeding habitat: Shallow wetlands within or near forested habitat. Summer habitat: Closely associated with woodland and forest habitats. Often found in residential areas where it may be seen on windows feeding on insects attracted to lights. Winter habitat: Terrestrial. Body can withstand partial freezing. (MN DNR, 2022)
Reproduction: Gray treefrogs breed in May when they move to breeding ponds. Clusters of up to 30 eggs are attached to vegetation near the surface of the water. The eggs hatch in three to six days. Tadpoles transform within two months. Adults reach maturity within two years. (MN DNR, 2022)
