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.
A Food chain is a series of organisms depending on next one to feed upon. This chain is generally shown by arrow links from prey to its predator. Basically a food chain starts from a plants that eat no other organisms in the chain and ends at a species that is not eaten by any other species.