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.
Every living organism needs energy to live. Plants get their energy from the Sun, some animals get their energy from eating plants, and other animals get energy from eating other animals. A food chain is a way of organizing living things by what they eat. It shows who's eating who. The arrows in a food chain show the flow of energy. Everything in the food chain is either a producer or a consumer.