Generally, large birds and seabirds live longer than small birds. Albatrosses live so long that it is hard to calculate their survival rates - they can live longer than the metal rings that identify them, and probably longer than most humans.
Food chain. Definition. A feeding hierarchy in which organisms in an ecosystem are grouped into trophic (nutritional) levels and are shown in a succession to represent the flow of food energy and the feeding relationships between them. Supplement.
All living things need food to have energy which help them to grow and move.A food chain tells how each living thing gets its food and how most of living beings are dependent on each other for their energy requirement.It is also called food web or energy pyramid.A food chain always starts with a producer, which in most of the cases is a plant and it ends with a predator,it is at the top of the food chain.