The Pickerel Frog is common in Connecticut. Its skin is light brown with distinct, blocky, darker brown spots. Pickerel frogs are never green. Their bellies are white and the skin under their legs is orangey-yellow. This is believed to be a warning of their unpalatability. Pickerel frogs can be 2 to 3 1/2 inches long. Northern Leopard Frogs and Pickerel Frogs are sometimes confused. A pickerel frog is never green. It has orange-yellow skin under its legs. Its spots are squarish. A leopard frog can be green or brown. The skin under its legs is white. Its spots are rounded.