This photo shows the two sister species of grey treefrogs. Hyla chrysoscelis is on the left and Hyla versicolor is on the right. The variation in color is common to both species, individuals of either species can range from green to grey. The difference in pupil size is an artifact of the lighting, both have similar pupil shape.
James Harding (photographer; copyright holder; identification), Michigan State University
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To cite this page: Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2014. The Animal Diversity Web (online). Accessed at http://animaldiversity.org.
Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students. ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control.