Behavior Birds 39 Primates 39 Social behavior in animals 39 Ecology 36 Psychology 34 Chimpanzees 25 more ... Dogs 25 Evolution 24 Ants 21 Cognition in animals 20 Animal communication 18 Human-animal relationships 18 Research 18 Dolphins 16 Mammals 16 Cats 15 Conservation 15 Insects 14 Apes 13 Animal behavior 10 Psychology, Comparative 10 Training 10 Effect of human beings on 9 Animal intelligence 8 Bonobo 8 Domestic animals 8 Habitat 8 Honeybee 8 Human behavior 8 less ...