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

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 ...