northern leopard frog

amphibian

Also known as: Rana pipiens

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Last updated

July 21, 2026

Quick Summary

The northern leopard frog is a group of North American frogs belonging to the family Ranidae. Previously considered a single species, Rana pipiens, it is now recognized as part of the Rana pipiens complex, with several distinct species sharing a similar color pattern. These frogs are characterized by their slender bodies, long legs, and a pattern of dark spots on their backs. They are semiaquatic and typically found in marshy habitats across North America.1

In the 1960s, significant population declines were observed in some northern leopard frog populations, with potential causes including pollution, habitat loss, increased UV radiation, disease, and overharvesting. These declines are thought to have foreshadowed a broader worldwide amphibian decline.1

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leopard frog
…the 1960s several populations of R. pipiens from Vermont to Minnesota experienced major population crashes. The reason for these declines is not completely known; however, pollution, habitat loss, increases in ultraviolet radiation resulting from the thinning of the ozone layer, disease, and overharvesting by laboratories and collectors are often cited.
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…the 1960s several populations of R. pipiens from Vermont to Minnesota experienced major population crashes. The reason for these declines is not completely known; however, pollution, habitat loss, increases in ultraviolet radiation resulting from the thinning of the ozone layer, disease, and overharvesting by laboratories and collectors are often cited.
Read More