They are too morphologically different to interbreed. Adult leopard frogs measure 2-5 inches (5-13 cm) in length. Listen to a sample of a Southern Leopard Frog call: 143KB WAV file-- or -- 104KB AU file (from Animal Diversity Web.) Because Northern Leopard Frogs lay more eggs per mass than Wood Frogs (2000-4000), but the eggs are much smaller, the entire egg masses end up being about the same size (roughly baseball to softball sized). The pickerel frog’s spots are angular and usually arranged into two rows down the back, whereas the leopard frog’s spots are rounded or oval and are in a more random pattern. It has prominent ridges running along each side, long hind legs, a pointed head and a plain white belly. Specimens of the Southern leopard frog have only been collected from Scioto County. To the best of my knowledge, Northern and Southern Leopard Frog eggs are indistinguishable from each other. In Ontario, the pickerel frog is the frog species most similar in appearance to the northern leopard frog. Tadpoles can grow to 3 inches (8 cm) or more before growing arms and completing metamorphosis. Listen to a sample of a Northern Leopard Frog call: 205KB WAV file-- or -- 149KB AU file (from Animal Diversity Web.) Green to brown for … The Northern leopard frog (Rana pipiens) and Southern leopard frog (Rana utricularia) are morphologically similar, but their mating calls sound very different. It even lives in slightly brackish marshes along the East Coast. The plains leopard frog is medium-sized, with a light tan ground color and numerous rounded spots on the back. B. Description: Southern Leopard Frogs (Rana [Lithobates] spenocephala) are mid-sized frogs-- 2 - 3.5 in (5.1 - 8.9 cm), that are brownish to green in ground color with large dark green to brown spots on its back, sides, and legs (spots on the sides and legs may be smaller than those on the back). Leopard frogs, northern leopard frog, southern leopard frog. When leopard frog tadpoles complete metamorphosis the juvenile frogs often only measure an inch or so in length. Habitat: The southern leopard frog is found in many types of shallow, freshwater environments. The tympanum (rounded ear spot) has a white spot in the middle. Size. The upper jaw has a light, sometimes yellow stripe. Similar Species. A. Description: The southern leopard frog is a slender, beautifully spotted frog that may be bright green, brown, tan, gold or bronze with scattered, well-defined dark brown spots. Its found in the southwestern part of the state. Learn how Leopard Frogs have adapted for Protection in this Weird Frog … The spots can be brown or greenish brown and are not ringed with white. Based on this, what is the best explanation for why these frogs are considered separate species? The Plains Leopard Frogs has a break and an indent near its butt while the North and South Leopard Frog just has a straight line. In Ohio, this includes the bullfrog, green frog, northern and southern leopard frogs, pickerel frog, and wood frog.