Which groups of animals participate in adaptive social behavior?

Two red deer battling for dominance during rutting season is one example, a crowd of wildebeest or gnu and army ants are all animals who participate in adaptive social behavior.

The suite of interactions that occur between two or more individual animals, usually of the same species, when they form simple aggregations, cooperate in sexual or parental behaviour, engage in disputes over territory and access to mates, or simply communicate across space.