One species will become ext nct or change to occupy a slightly different niche. In humans, females are unaware when they are ovulating. Individuals of the same species. Climatic conditions, availability of food, availability of mates, and predators. Active during the day.
Most humans are active during the day.
Both males and females have dominance hierarchies. They vary in stability and linearity. Swelling of the perineal region that occurs for a variable period around ovulation. Highly visible and may also involve pheromones. Species whose diet consists primarily of foliage.