via Dwaleberry, via Darren Brown
"In a fascinating example of vocal mimicry, researchers from the Wildlife Conservation Society (WCS) and UFAM (Federal University of Amazonas) have documented a wild cat species imitating the call of its intended victim: a small, squirrel-sized monkey known as a pied tamarin. This is the first recorded instance of a wild cat species in the Americas mimicking the calls of its prey.
The extraordinary behavior was recorded by researchers from the Wildlife Conservation Society and UFAM in the Amazonian forests of the Reserva Florestal Adolpho Ducke in Brazil. The observations confirmed what until now had been only anecdotal reports from Amazonian inhabitants of wild cat species -- including jaguars and pumas -- actually mimicking primates, agoutis, and other species in order to draw them within striking range."
http://www.sciencedaily.com/releases/2010/07/100708141620.htm