How do you study a species that is so rare that it will probably become extinct in a few short decades? This is the question confronting those who study chimpanzees, Pan troglodytes, in the wilds of Liberia, one of several African nations where the bushmeat trade is exacting its final, terrible toll on the closest living relative to humans.

http://www.guardian.co.uk/science/punctuated-equilibrium/2011/aug/25/1