Behavioral Sink

The "Behavioral Sink" is a term describing abnormal or destructive behaviors that can occur in animals when they are kept in highly crowded or stressful conditions. Coined by ethologist John B. Calhoun, it refers to the breakdown of social structures, increased aggression, and neglect of usual behaviors like grooming or parenting. Essentially, excessive population density leads to stress and social chaos, which can mirror issues in densely populated human environments, highlighting how overcrowding can negatively impact social behavior and mental health.