The green tree frog was first called the "blue frog" ("Rana caerulea"). The original specimens White sent to England were damaged by the preservative and looked blue. The color of the frog is caused by blue and green pigments covered in a yellow layer. The preservative destroyed the yellow layer. It left the frog looking blue. The word "caeruela", which means blue in Latin, is part of the green tree frog's scientific name. The frog is also more known as the "green tree frog". However, that name is often given to the larger green tree frog ("Hyla cinerea") in its region.
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