Description: A small (¾” to 1½”), tan to gray frog with a distinctive dark X on their back. While singing, the throat fills up with air, which can resemble a large bubble.
Where to look: In eastern Pennsylvania, this common frog can be found in permanent and temporary ponds near wooded areas. Peepers often sing from the edges of ponds, often several inches above the ground, clinging to vegetation.
Note: This well-known species is often one of the first signs of spring and can be heard from quite a distance.