What are the types of animal social groups?

solitary^ᛦ

pair^ᛦ

family^ᛦ

harem^ᛦ

matriarchy^ᛦ

oligarchy^ᛦ

Arena/Lek^ᛦ

hierarchy^ᛦ

aggregation^ᛦ

caste system^ᛦ

social animal^ᛦ

eusocial animal^ᛦ