Color polymorphisms and their effect on cryptic behavior in juvenile northern leopard frogs, Rana pipiens.

Specifically, this paper addresses the following questions: 1. Is background color distributed nonrandomly (e.g. color could be correlated with size)? 2. Do frogs choose matching substrates under manipulated laboratory conditions? In particular, do green frogs behave differently than brown ones? 3. Do frogs change color from green to brown in response to their background?http://deepblue.lib.umich.edu/bitstream/2027.42/54774/1/3215.pdfDescription of 3215.pdf : Access restricted to on-site users at the U-M Biological Station