A rare toad changed the fate of a river by becoming the first amphibian to halt a hydroelectric dam. It's now in trouble.

ARVOREZINHA, Rio Grande do Sul, Brazil — The admirable little red-bellied toad is the size of a thumb, but it has achieved giant feats: In 2014, it prevented the construction of a small hydroelectric ...

Meet our story hero: the admirable red-belly toad. A tiny amphibian found nowhere else on Earth but a small forest patch in southern Brazil. Listed as a critically endangered species, it is capable of ...

The admirable little red-bellied toad is the size of a thumb, but it has achieved giant feats: In 2014, it prevented the construction of a small hydroelectric dam that threatened to alter its only ...

Known in Brazil as the admirable little red-bellied toad, the rare Melanophryniscus admirabilis is endemic to a stretch of the Forqueta River in Rio Grande do Sul state. It made history in 2014 when ...