leopard frogs were widely collected not only for dissection but for the food industry (frog legs) as well. However, massive declines beginning in the early 1970s, particularly in Canada and the ...

The relict leopard frog has the dubious distinction of being one of the first North American amphibians thought to have become extinct. Although the species was known to have inhabited more than 60 ...

Researchers know frogs were hopping ... similar to the tadpoles of today — even containing remnants of a gill scaffold system that modern-day tadpoles use to sift food particles from water.

The relict leopard frog has the dubious distinction of being one of the first North American amphibians thought to have become extinct. Although the species was known to have inhabited more than 60 ...