Brazilian ranchers are being attacked by an unknown creature. There's a wide range of suspects from jaguars to caimans.

Hundreds of endangered ridley sea turtles are turning up dead and half-eaten along the beach in Costa Rica during the monthly Arribata.

Crocodiles in Australia's Northern Territory are mysteriously showing up dead with no clear sign of trauma. Looking at what could be killing these predators.

In the jungles of Luzon Province, locals believe a vampire-like evil spirit has begun picking off villagers and livestock, taking them away without a trace.

Kangaroos are being mauled in Victoria, Australia; the wounds mimic those seen by lions, tigers and cougars in other parts of the world, but there are no big cats in Australia.

In Ecuador, a killer is loose in the wild as livestock are being mutilated and left uneaten. Could it be proof the mythical Andean Mountain Wolf exists?