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Widespread use of DDT
- Science eventually revealed the primary cause to be the widespread use of DDT. The chemical remained in the environment for a very long time and affected the eggs of the Bald Eagle to the extent that eggs were weak and would not sustain a chick. Consequently, their numbers dropped to where they were endangered.
extension.illinois.edu/blogs/naturalist-notebook/2018-01-24-bald-eaglesBald Eagles | Naturalist Notebook | Illinois Extension | UIUC
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By 1940, the decline of Bald Eagles compelled Congress to pass the Bald Eagle Protection Act, which outlawed the killing and disturbing of eagles, as well as the possession of eagle parts, including feathers, eggs, and nests.
- Bald Eagle No Longer ‘Threatened
Challenger, a Bald Eagle, was released yesterday during an...
- Overview
He was a pioneer in re-establishing eagles after their...
- Bald Eagle No Longer ‘Threatened
Still, by 1985 only a single breeding pair of Bald Eagles survived in Illinois, and the over-wintering population on the Mississippi and Illinois rivers had dropped well below 600 individuals. Today, Bald Eagle recovery is one of the success stories of endangered species protection efforts.
May 2, 2022 · Although bald eagles may be increasing in Illinois, that may not be the case throughout their range. A report casting doubt on the long-term growth of North America’s bald eagle and golden eagle populations recently gained national attention.
Mar 26, 2021 · The once dwindling bald eagle population that brought the raptor close to extinction in the United States has soared in the past decade, according to a new report by the U.S. Fish and Wildlife...
Nov 11, 2021 · America’s most iconic bird, the Bald Eagle, was declared an endangered species in 1967 and at its lowest numbers, there were only three nests in Illinois. But the species' population has rebounded in the past two decades. Here in Illinois there are now nests in all 102 counties.
Jan 4, 2024 · While Illinois’ bald eagle population swells during the winter, an increasing number are making the state their permanent home. In Will County alone, five bald eagle hatchlings were born in 2023.
Feb 17, 2023 · Humans were largely to blame, due to habitat destruction, hunting, and the insecticide DDT, which made eagle egg shells brittle. The bird was added to the Endangered Species List in 1967. Efforts to protect the bald eagle population helped the species recover to the point that it was removed from the list altogether in 2007.
