Subject Group: Animals 
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- Amphibians
- Anadromous fishes
- Animal behavior
- Animal breeding
- Animal communication
- Animal diseases
- Animal ecology
- Animal genetics
- Animal germplasm resources
- Animal intelligence
- Animal migration
- Animal pests
- Animal rights
- Animal rights movement
- Animals
- Ants
- Aquatic animals
- Bats
- Bears
- Beavers
- Biological diversity
- Biological diversity conservation
- Birds
- Butterflies
- Caribou
- Cattle
- Chimpanzees
- Cockroaches
- Coyotes
- Crocodiles
- Deer
- Dogs
- Dolphins
- Eagles
- Earthworms
- Elephants
- Elk
- Endangered animals
- Endangered species
- Entomological research
- Entomology
- Exotic animals
- Extinction (Biology)
- Fish kills
- Fishes
- Frogs
- Fur trade
- Game and game birds
- Game laws
- Goats
- Habitat conservation
- Hawks
- Horses
- Human-animal relationships
- Hunting
- Indian hunting and fishing rights
- Insect pests
- Insects
- Invertebrates
- Ivory
- Laboratory animals
- Lions
- Livestock
- Mammals
- Manatees
- Marine animals
- Marine fouling organisms
- Marine mammal protection
- Marine mammals
- Migratory bird conservation
- Mollusks
- Mosquitoes
- Moths
- Oil spills and wildlife
- Otters
- Owls
- Pandas
- Panthers
- Pelicans
- Pets
- Poaching
- Police dogs
- Poultry
- Predator control
- Primates
- Protection of animals
- Protection of farm animals
- Rabbits
- Rabies
- Reindeer
- Reptiles
- Salmon
- Sea birds
- Sea lions
- Sea turtles
- Seals (Animals)
- Sharks
- Sheep
- Shellfish
- Snakes
- Songbirds
- Species
- Swine
- Tigers
- Trapping
- Tuna
- Tuna fisheries
- Turtles
- Veterinarians
- Veterinary medicine
- Whales
- Whaling
- Wild animal trade
- Wild horses
- Wildlife
- Wildlife conservation
- Wildlife management
- Wildlife refuges
- Wildlife reintroduction
- Wolves
- Worms
- Zoo animals
- Zoological research
- Zoology
- Zoos