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Northern leopard frogs were once prolific in Arizona.

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How the leopard (frog) lost its spot
Once rich in numbers, the northern leopard frog is facing possible extinction in the western United States.

Once widely distributed throughout the United States and Canada and often found on high school biology dissection trays, the northern leopard frog (Lithobates pipiens) is facing a rapid decline in population in Arizona and other western states.

By Wendy Howell July 18, 2017