These isolated, pocket-sized silky anteaters live among the mangroves of Brazil’s Atlantic coast.

Lightning and other environmental electricity may jumpstart reproduction for the Amazon Basin fish.

The Juan Deriba killifish, found in a tiny area of Bolivia, jumps out of water to evade threats.

A conservation biologist in Argentina once hosted one of the animals in her living room, but finding them in the wild has proven far more difficult.

Scientists hatch a bold plan to save Brazil's critically endangered golden lancehead, which lives on a single infamous isle.