AP BIOLOGY

Detailed explanation-1: -Animal migration is the relatively long-distance movement of individual animals, usually on a seasonal basis. It is the most common form of migration in ecology. It is found in all major animal groups, including birds, mammals, fish, reptiles, amphibians, insects, and crustaceans.

Detailed explanation-2: -Migration is a pattern of behavior in which animals travel from one habitat to another in search of food, better conditions, or reproductive needs.

Detailed explanation-3: -During unfavourable season, birds travel long distances in search of food and shelter.

Detailed explanation-4: -Birds and animals migrate over large distances to find food or nesting sites. Many animal species migrate, including species of fish, crustaceans, amphibians, reptiles, insects, and mammals. These animals might journey by land, sea, or air to reach their destination, often crossing vast distances and in large numbers.