frog

The yearling frogs are about half the size of the older H. versicolor population, but retain the same characteristics. Gray treefrogs continue to grow each year until they achieve the physical limit of the species. (Collins and Conant, 1998; Harding, 1997)

Lifespan/Longevity

One captive gray treefrog lived for over seven years in captivity. Unfortunately, it was not distinguished as H. chrysoscelis or H. versicolor. The potential lifespan in captivity and the wild is unknown. It is likely that few gray treefrogs die of old age, predators, disease and climactic extremes are more likely causes of death. (Harding, 1997)

The Gray Tree Frog (Hyla versicolor), written more commonly as one word as Gray Treefrog, is a species of small arboreal frog native to much of the eastern United States and southeastern Canada.
It is sometimes referred to as the Eastern Gray Treefrog or Common Gray Treefrog or Tetraploid Gray Treefrog in order to distinguish it from its more southern genetically disparate cousin, the Cope's Gray Treefrog, Hyla chrysoscelis. It may sometimes be referred to as the North American Tree Frog by Europeans in order to distinguish it from their European Tree Frog, Hyla arborea.

The Cope's Grey Tree Frog (Hyla chrysoscelis) is a species of tree frog which is found in the United States. It is almost indistinguishable from the Grey Tree Frog, Hyla versicolor, and shares much of its geographic range. Both species are variable in color, mottled gray to gray-green, resembling the bark of trees. These are tree frogs of woodland habitats, though they will sometimes travel into more open areas to reach a breeding pond. The only readily noticeable difference between the two species is the call - Cope's has a faster paced, and slightly higher pitched, call than H. versicolor. In addition, H. chrysoscelis is reported to be more slightly smaller, more aboreal, and more tolerant of dry conditions than H. versicolor (Martof et al., 1980). The range of H. chrysoscelis is more southerly-it is apparently the species found in the lower elevation Piedmont and Coastal Plain of Virginia and the Carolinas. In those areas, H. versicolor may be present only in the Appalachians (Martof et al. 1980).

The Bird-voiced Tree Frog, Hyla avivoca, is similar to Hyla chrysoscelis/versicolor, but is smaller (25-50 mm length, vs. 32-62 mm for the Grey Tree Frogs).

As the species name Hyla versicolor implies, gray tree frogs are highly variable in color owing to their ability to camouflage themselves from gray to green, depending on the substrate they are sitting on. The degree of mottling varies. They can change from nearly black to nearly white. They change colors more slowly than a chameleon. Dead gray tree frogs and ones in unnatural surroundings are predominantly gray in color.
They are relatively small compared to other North American frog species, typically attaining no more than 1.5 to 2 inches (4 cm to 5 cm) in length. Their skin has a lumpy texture to it, giving them a warty appearance. They are virtually indistinguishable from the Cope's Gray Tree Frog, Hyla chrysoscelis, the only readily noticeable difference being their calls. Cope's Gray Tree Frog has a shorter, faster call [2]. The Gray Tree Frog also has an extra set of chromosomes (4N), or 48 in total, and is called Tetraploid Gray Treefrog in scientific circles. The more southerly Cope's Gray Treefrog, or Diploid Gray Treefrog, retained its 2N (24) original chromosome set, so there is speculation of successful hybridization in the past.
Both Hyla chrysoscelis and Hyla versicolor have bright yellow patches on the hind legs, which distinguishes them from other tree frogs, such as Hyla avivoca (Martof et al. 1980). The bright patches are normally only visible while the frog is jumping. Both species of Gray tree frogs are slightly sexually dimorphic. Males have black or gray throats, while the throat of the female is lighter (Tyning 1990).

http://10000birds.com/gray-tree-frogs-hyla-versicolor.htm http://en.wikipedia.org/wiki/Gray_tree_frog

Green or Gray Treefrog? http://www.in.gov/dnr/fishwild/3346.htm

Spring Peepers are tan or brown in color with a dark cross that roughly forms an X on their dorsa (thus the Latin name crucifer, meaning cross-bearer^[1]), though sometimes the marking may be indistinct.^[2]^[3] They have a body length between less than an 1 inch (25 mm) to 1.5 inches (38 mm)^[3] and a weight between 0.11 ounces (3.1 g) to 0.18 ounces (5.1 g).