This male-male competition ends around the same time that the reproductive season does.

With male-male competition for mates, horns are clashed in combat.

Sexual dimorphism is a result of male-male competition that is easily seen in species.

Species with intense male-male competition are known to exhibit the most size dimorphism.

Two types of sexual selection processes are male-male competition and female choice.

In male-male competition, males compete for the opportunity to breed.

The red collar is for male-male competition, while female choice is based on tail length.

Sexual selection may act on male performance capacity in male-male competition and territorial behaviors.

Since male-male competition has an effect on body maintenance due to high energy costs, a larger body size will be beneficial.

A large body size does not guarantee success in male-male competition within arboreal environments.