Instinctive behavior refers to actions that are performed automatically and do not require conscious thought. These behaviors are often innate, meaning they are present at birth and are typically consistent across individuals of the same species. Examples include a baby human grasping a finger or a bird migrating seasonally. Such behaviors are crucial for survival and reproduction. For instance, animals may exhibit instinctive behaviors like building nests, finding food, or fleeing from predators. These actions are driven by biological processes and can be observed in various species, highlighting the importance of instinct in the natural world.