The hard to see, but easily heard, small frogs called spring peepers (Hyla crucifer) start breeding from March to June. Males start calling for mates in early March. Don't mistake the chirping for crickets, which call each other in late summer and early fall.

This female spring peeper treefrog shows off her large toe pads.

A wood frog is perched atop masses of jelly-covered wood frog eggs laid in a vernal pool. Seasonally wet pools in the woods host a variety of specialized creatures, including wood frogs and spring peepers. But unlike spring peepers, the wood frog has no large X across its back.

A male spring peeper, showing part of the X on its back, calls for a mate.

A spring peeper perches on an inky cap mushroom in the Eastern U.S.

A young spring peeper hides on dew-covered grass in a Virginia swamp. The frog is only 1/4-inch (6 mm) long.

A spring peeper treefrog calls from its perch.