The Arizona Tree Frog (Hyla eximia) was designated the state amphibian of Arizona in 1986. Elected by the school children of Arizona during the "Arizona Wildlife Awareness" program in 1985 (sponsored by Arizona Game & Fish Commission), the Arizona tree frog won over the other three finalists: the red spotted toad, the Colorado River toad, and the spadefoot toad.

Found in the mountains of central Arizona and western New Mexico, The Arizona frog inhabits oak, pine and fir forests above 5,000 feet elevations. Also called mountain frog, the diminutive Arizona tree frog is only 3/4" to 2" long. It is usually green but can also be gold to bronze in color (with a whitish belly). Arizona tree frogs have a dark stripe that starts at the snout, runs through the eye, and extends along its body to just before the rear legs. It may also have spots or bars on its back.

Primarily nocturnal and spending most of the year inactive (as do most amphibians), Arizona tree frogs may be heard calling sporadically from tree tops in the early part of the rainy season (only the male vocalizes, making a nasal clacking sound). Their diet consists entirely of insects, shrubs, or dense grass around water.

Source:

Arizona Tree Frog - (Hyla eximia): Arizona State Library
Arizona's Official State Amphibian: Netstate.com
 
*Photo of Arizona Tree Frog © Frogs & Toads: unable to request permission for use of this image - we need help! Someone who speaks both English and Japanese please E-mail.

Links:

State Reptiles & Amphibians - 50 States List