The Behavioral sink is described as the collapse (or sinking) of "good" behavior and increases in destructive behaviors caused by overcrowding. Overpopulation can cause disturbances to everyone. It can cause aggression, impulsiveness, and irritation. Some social behaviors that sink when these certain people or animals face overcrowding are; developing a staked territory, they formed groups that could help them survive in the situation, and also decline in social stability that leads to a collapse in successful production; the stable social group has a high rate of survival and fertility, they also feel secured and belong, but when groups who have unstable situations face high behavioral disturbances and retarded rates of growth. Some low ranks also suffered from bullying and other discrimination in the community. Overcrowding can lead to psychological distress and withdrawal from any social interaction.