Female spadefoot toads flout the general evolutionary rule of not breeding with other species. Under some conditions they mate with other species to help boost the survival rates of their offspring.
The yellow-legged frog population in the Willamette Basin or Oregon has gone from very abundant to almost completely extirpated in less than 50 years. A few dozen breeding-age yellow-legged frogs in two sites are all that remain.
A study suggests nearly all 162 land-breeding frog species living on Caribbean islands originated from a single frog species about 30- to 50-million years ago.
Biologists released 68 gopher frog tadpoles and four newly-metamorphosed gopher frogs recently in an artificial pond at the Williams Bluffs Preserve in Georgia. The release marks the start of aneffort to establish a self-sustaining gopher frog population