Behavior and color changes of tree frogs.

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Abstract
Reviews results of observations and experiments on the behavior and color changes in 2 species of tree frogs, Hyla versicolor and H. arborea. The study of Hyla arborea was limited to about 2 mos, while that of H. versicolor covered a period of several years. These species show that, on the average, a lightening of skin color occurs in the presence of strong light. Darkness does not have an effect in relation to color changes. A high temperature acts as strong light to induce a proximal migration of chromatophores, hence, producing a lightening of skin color. Low temperature does not have any direct effect on color changes. Concludes that color changes of these species seems largely under nervous control, and various emotional and other psychical factors appear to be dominant in these behaviors. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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