What animal was affected by the use of DDT to point becoming an endangered species?

The bald eagle (Haliaeetus leucocephalus) was the animal that was affected by the use of DDT to the point of becoming an endangered species. DDT, or dichlorodiphenyltrichloroethane, is a synthetic organochlorine insecticide that was widely used in the United States and other countries from the 1940s to the 1970s. It was used to control a variety of insect pests, including mosquitoes and agricultural pests.

DDT is a persistent organic pollutant (POP), which means that it does not break down easily in the environment and can accumulate in the tissues of animals, including humans. In birds, DDT can interfere with calcium metabolism, causing eggshells to become thin and break easily. This led to a decline in the reproductive success of bald eagles and other birds of prey, causing their populations to decline.

The use of DDT was banned in the United States in 1972, and bald eagle populations have since recovered. The bald eagle was removed from the endangered species list in 2007.