Pacific Tree Frog, Pseudacris regilla Family Tree Frog (Hylidae) Size 3/4-2" Breeding November to July. Specific time depends on local conditions. Food Spiders, beetles, flies, ants and other insects. Habitat Breeds in water but habitat includes forests, chaparral, grasslands, etc.     This cute little frog is far more likely to be heard than seen. It is extremely common in Northern California, Oregon and Washington and is a species of chorus frog. It comes by that name for good reason. When it comes time to mate (some time between November and July -- it varies depending on location), the males migrate to water. Once there, they be begin to call -- all at the same time -- very loudly. Pacific Tree Frogs are active both during the day and night (and can be heard during both). Despite the name, these frogs do not live in trees but are a ground-dweller and are found most often in vegetation near water. The sticky pads on its toes does allow it to climb so it is sometimes found higher -- including occasionally in trees. The color of Pacific Tree Frogs can vary considerably -- initially leading one to believe them to be different species. It has been found though that these frogs are actually able to morph their coloring over several weeks to months. The color change is triggered by a change in background brightness such as from seasonal fluctuation. [1] You can see the wide variety of color variation at the californiaherps.com Pacific Tree Frogs page. caption: file: x - square 0" x 0" at 300 dpi - release: contact us regarding image add image to lightbox References http://www.californiaherps.com/frogs/pages/p.regilla.html http://en.wikipedia.org/wiki/Pacific_treefrog Alden, Peter, and Fred Heath. National Audubon Society Field Guide to California. New York: Knopf, 1998.