I've visited several of the best-known zoos in the United States... the Bronx Zoo, the San Diego Zoo, the Saint Louis Zoo, and the Houston Zoo all come to mind; I'm sure there have been others. Unfortunately, photos have either been lost from many years ago, or never existed in some cases, as there was a period where I recorded almost everything in video (gasp!).
Consequently, this album will consist of photos taken at the two Tucson-area zoos - the internationally known Arizona-Sonora Desert Museum, and the much smaller Reid Park Zoo. It's pretty easy to determine the location - if it's a critter like an elephant or giraffe that's not found in the Sonoran Desert, then that photo was taken at the Reid Park Zoo.
*** Above the zoo... Part of the ASDM's Raptor Free Flight program. ***