Animals 124 Animal behavior 122 Congresses 55 Animal industry 53 Livestock 46 Laboratory animals 41 Marine animals 37 Zoology 37 Animal nutrition 36 Diseases 32 Periodicals 31 Behavior 30 Computer animation 30 Animal ecology 29 Animal populations 27 Domestic animals 20 Folklore 19 Social behavior in animals 19 Mammals 18 Psychology, Comparative 18 Research 18 Animals, Laboratory 17 Animal communication 16 Physiology 16 Morphology (Animals) 15 Veterinary medicine 15 History 14 Primates 14 Computer graphics 13 Human behavior 13