The Frog that Turns Blue
The moor frog (Rana arvalis) looks like most other frogs , froggy and mostly brown, except during the spring mating... ...squo;s when the males turn an attractive shade of blue ! They emerge from hibernation looking for a femal... ......
https://www.neatorama.com/2014/05/12/The-Frog-that-Turns-Blue/
