• 36 Life sciences
• 29 Zoology
• 19 Animal behavior
• 19 Behavior
• 19 Sexual behavior in animals
• 13 Animals
• 13 Evolution (Biology)
• 7 Animal diversity
• 7 Biodiversity
• 6 Anatomy
• 6 Health
• 6 Health behavior
• 6 Human anatomy
• 6 Human biology
• 6 Human body
• 6 Human physiology
• 6 Self-care, Health
• 6 Speciation
• 1 Anatomy, Comparative
• 1 Ecology
• 1 Effect of environment on
• 1 Environmental degradation
• 1 Environmental quality
• 1 Environmental sciences

• 42 English

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