As many of you know, the Bald Eagle is our national symbol. It stands for freedom, strength and power. The eagle, as well we several other species of birds, suffered an unfortunate decline with the use of an insecticide named DDT. DDT was first used in WWII to stop the spread of malaria and to kill mosquitoes. As DDT was killing the mosquitoes it was also damaging the environment.
In 1962 Silent Spring by Rachel Carson was published. This book drew lots of attention to the rise of DDT and decline of bird populations. Silent Spring was one of the main reasons for the environmental movement, which gave rise to the Endangered Species Act of 1973. DDT was banned on a world wide level in 1972, just 10 years after Rachel Carson's book was released.
The main effect of DDT on bald eagles was a thinner egg shell. This caused the egg's to break under the weight of the parent eagles, causing a rapid decline in the species. The eagle has come a long way since 1962 (and before) and is now removed from the endangered species list. The bird will be continue to be monitored for the next 5 years, to ensure that the species is on the rise!
