Bald Eagles were reduced to only 500 breeding pairs in 1970s but after strong strong federal protection and ban on the use of pesticide DDT their population by more than 15 times. This has lead to great success as bald eagles were officially removed from the List of Endangered and Threatened Wildlife on June 28, 2007. However as the old saying says all good things do not last long. The same could apply with Bald eagles, especially since recently the environmental organization in Maine found an alarming accumulation of mercury in the blood and feathers of bald eagle chicks in the Catskill Park region of New York.
Population of Bald eagles has been growing steadily in the last couple of years but these levels of mercury have big potential to cause reproductive problems that could cause decrease in eagles population. It would be really a big shame if this (rare) positive trend of increase in bald eagles population comes to an end. These gracious birds are symbols of strength and freedom, and the only thing that threatens them is human activity.