Sites

The History of Zoos (Popularity: )
http://www.bornfree.org.uk/zoocheck/zczoos03.htm
A brief overview offered by Zoo Check, an anti captivity project of the Born Free Foundation.

Zoo and Aquarium History (Popularity: )
http://www.milwaukeezoo.org/bartlett_society.html
The Bartlett Society offers historical articles discussing the Tower Menagerie, the Cincinatti Zoo, the Philadelphia Zoo, and the Washington Park Zoo.

Zoos: A Historical Perspective (Popularity: )
http://www.sil.si.edu/ondisplay/zoos/
Online exhibition by the National Zoological Park Library, Smithsonian Institution.