Quiz #3: Amphibian

Name this partially hidden amphibian who I photographed near Boston, MA.

Photo of Quiz #3: Amphibian

A. Green Frog

B. American Bullfrog

C. Pickerel Frog

D. Northern Leopard Frog

When you are ready, scroll down for the answer…

A is… incorrect.  Green Frogs (Lithobates clamitans) have prominent dorsolateral ridges, but lack spots.

B is… incorrect.  American Bullfrogs (L. catesbeianus) lack spots and long dorsolateral ridges.

C is… incorrect.  Pickerel Frogs (L. palustris) tend to have two rows of squared-off spots on their backs, and their background body color is brownish, not green.

D is… CORRECT! The Northern Leopard Frog (L. pipiens) has roundish dark spots with light borders. Their background can be similar to Pickerel Frogs, but is more often green.

5 thoughts on “Quiz #3: Amphibian”

  1. nice pic…tough to make a certain call between leopard and pickerel frog in this pic b/c I can’t see the typanum or the entire snout….I’d venture to guess Northern Leopard frog. Any other pictures?

    1. I agree Dan, this might be a good case to say we can’t be certain. But you’ve narrowed it down nicely! Next time I’ll try to get a better shot of the face.

  2. Looks like a Leopard Frog, but I would want to see the frog’s underside to eliminate Pickerel Frog which would show a yellowish/creamy color on the inner thighs.

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