Poles Apart: A Comparison of the Arctic and the Antarctic Regions.
This is a talk that I gave to an Audubon group. It has information on similarities and differences between the Arctic and the Antarctic. It also has information on common birds and mammals found in each ecosystem.
This is a talk that I gave to an Audubon group on the wildebeest migration in Masai Mara. It explains why the wildebeest is a keystone species in the Serengeti Ecosystem and gives examples of top down and bottom up population regulation.