Hyla versicolor By Matt Young July 15, 2013 12:00 MST Photograph by Darren Garrison. Hyla versicolor – gray tree frog. Mr. Garrison writes, “BTW, the frog can change its skin color somewhat – they used to hang around my elephant ear plants a lot when I was drip-irrigating them (setting up a mini-biome.) I’d often look out and see one of the frogs clinging to the outside of a window. But sometimes they are dark colored like the one in the first photo, and sometimes white (but always with the yellow patches on the rear legs).”