A tiger walks the same worn groove along the edge of its exhibit, like a broken record. A parrot methodically plucks out its ...

Some examples of narcissistic behavior include inflating one’s accomplishments to gain praise, ignoring other people’s feelings, and deliberately taking credit for someone else’s work. Narcissistic ...

Examples of passive-aggressive behavior can include lateness, avoidance, and silence. Passive-aggressive behavior can damage relationships and make communication difficult. Passive aggression is a ...

Impulsive behavior can be part of an impulse control disorder or other mental health disorder but is not a disorder on its own. Some physical conditions can also cause impulsive behavior. An impulsive ...

Across captive settings, nonhuman primates may develop an array of abnormal behaviors including stereotypic and self-injurious behavior. Abnormal behavior can indicate a state of poor welfare, since ...

More than 100 recent cases of delirium, hallucinations and other unusual psychiatric behavior in Japanese patients treated with Tamiflu should have parents watching for similar reactions when treating ...