Moor Frog (Rana arvalis) is a member of the true frog family, Ranidae. It’s native to Europe and Asia. They grow to an inch and a half to 2 inches. Moor frogs are usually red or brown but sometimes can be found with yellow or gray coloring.
Moor frogs breed when they come out of hibernation. The males form choruses and call for the females. They even change their color to blue to attract mates for a few days.