Matamata

Chelus fimbriatus, by William H. Espenshade III, an article about these turtles. They occur in northern South America, including both the Orinoco River and Amazon River basins.
http://www.tortoise.org/archives/matamata.html

Matamata Turtle's

Chelus fimbriatus biology and captive requirements, by David T. Kirkpatrick.
http://www.unc.edu/~dtkirkpa/stuff/mata.html

Scientific Expeditions to Patagonia Organized by University of Connecticut

Groundbreaking ecological research at Torres del Paine National Park, Magallanes, Chile. Details about past and future expeditions.
http://www.canr.uconn.edu/paine/

Inti Wara Yassi

The wildlife refuge is located in Villa Tunari, Bolivia. It is operated by the help of volunteers from all over the world and focuses in wild animals (such as monkeys and wild cats) but no other animal is ever turned away.
http://www.intiwarayassi.org

Where to Watch Birds

Information and resources about birding places throughout South America.
http://birding.about.com/od/placessa/