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- Pelicans.[remove]4
- Hippopotamus.2
- Zoo animals.2
- Baboons.1
- Beaches--Florida.1
- Beaches..1
- Birds--Behavior.1
- Birds--Research.1
- Birds.1
- Captive chimpanzees.1
- Chimpanzees--Behavior.1
- Davis, Charles E., 1877-1933.1
- New York Zoological Park.1
- Ornithology.1
- San Antonio Zoo (San Antonio, Tex.)1
- Seals (Animals)1
- Wood stork.1
- Zoo keepers.1