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/

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

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