June 28, 2007. (Aug. 11, 2008)http://www.fi.edu/franklin/birthday/faq.html#21, "Desert Bald Eagle Returns to Endangered Species List." (Aug. 11, 2008)http://www.washingtonpost.com/wp-dyn/content/article/2006/12/24/AR2006122400666_pf.html, Webley, Kayla. It wasn't until the 1960s and 1970s that Bald Eagles became an emblem of the environmental movement as their numbers plummeted from the effects of the pesticide DDT. (Aug. 11, 2008)http://www.fws.gov/species/species_accounts/bio_eagl.html, "Bald Eagle Recovery: Questions and Answers." Weird & Wacky, Copyright © 2020 HowStuffWorks, a division of InfoSpace Holdings, LLC, a System1 Company. Fish and Wildlife Service. We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. In 1972, the chemical DDT was restricted in many areas, allowing bald eagles to reproduce fully once again without trouble. U.S. National Geographic News. Once DDT was banned and the species was fully protected under the fledgling Endangered Species Act , however, eagle numbers began to rebound, gradually at first and then with increasing vigor. "Bald Eagle Leaves Endangered Species List." (Aug. 11, 2008)http://www.npr.org/templates/story/story.php?storyId=11504430. It caused female eagles to be unable to reproduce and when they did reproduce, the insecticide would often cause infertile eggs. You consent to our cookies if you continue to use our website. DDT had caused problems for the bald eagle because it altered the bird's nervous system. Fact Check: What Power Does the President Really Have Over State Governors? Bald eagles are endangered because humans have contaminated the bald eagle's food through poisonous chemicals such as DDT, destroyed their habitat areas and shot them illegally. The Franklin Institute. Will 5G Impact Our Cell Phone Plans (or Our Health?! In 2007, the bald eagle population in the United States reached a level that brought it down from the "endangered" list to the "threatened" list, so scientists are hopeful for the growth of the species. Is the Coronavirus Crisis Increasing America's Drug Overdoses? ), The Secret Science of Solving Crossword Puzzles, Racist Phrases to Remove From Your Mental Lexicon. U.S. May 1, 2008. 1967: The government declares bald eagles south of the 40th parallel endangered. Although the bald eagle eats turtles, snakes, waterfowl and rabbits, they base their diet around fish. The DDT created an abundance of calcium in the eggshells too, which led to brittle eggs that easily snapped when delivered. The bald eagle is also protected under the Bald and Golden Eagle Act as well as the Migratory Bird Treaty Act. Updated June 2007. June 2007. In 1972, the chemical DDT was restricted in many areas, allowing bald eagles to reproduce fully once again without trouble. "Bald Eagles Soar Off Endangered Species List, But Will Act Be Weakened?" 1963: The U.S. "Bald Eagle." Dec. 25, 2006. Fish and Wildlife Service -- Bald Eagle, National Zoological Park -- Saving Our Symbol, An 'Impossible' Coral Reef System Discovered at Amazon River Mouth, Floating Fire Ant Rafts Are Horrifying, Dangerous, Really Cool, Information about the device's operating system, Information about other identifiers assigned to the device, The IP address from which the device accesses a client's website or mobile application, Information about the user's activity on that device, including web pages and mobile apps visited or used, Information about the geographic location of the device when it accesses a website or mobile application. (Aug. 20, 2008) http://www.fws.gov/news/NewsReleases/showNews.cfm?newsId=A4C4116B-F819-28C1-B8DCE55F7D9C5976, Roach, John. Is there something in turkey that makes you sleepy? Fish and Wildlife Service estimates 417 bald eagle nesting pairs are left in the lower 48 states. Fish and Wildlife Service. Fish and Wildlife Service. Festival of Sacrifice: The Past and Present of the Islamic Holiday of Eid al-Adha. How the Macy's Thanksgiving Day Parade Works, U.S. We also share information about your use of our site with our social media, advertising and analytics partners who may combine it with other information that you’ve provided to them or that they’ve collected from your use of their services. (Aug. 11, 2008)http://news.nationalgeographic.com/news/2007/06/070628-bald-eagles.html, Slevin, Peter. 1995: Bald eagles in the lower 48 states are moved from endangered status to threatened status. It caused female eagles to be unable to reproduce and when they did reproduce, the insecticide would often cause infertile eggs. Once in their bloodstreams, DDT caused females to produce eggs with shells too thin to protect the embryo. 2007: The government formally removes bald eagles from the endangered species list. (Aug. 11, 2008)http://www.fws.gov/migratorybirds/issues/BaldEagle/Bald%20Eagle%20Final%20Q&As.pdf, "Benjamin Franklin FAQ." DDT had caused problems for the bald eagle because it altered the bird's nervous system. The DDT created an abundance of calcium in the eggshells too, which led to brittle eggs that easily snapped when delivered. June 28, 2007. U.S. The bald eagle is the national symbol for the United States, so the American government decided to enact the Endangered Species Act to protect the bird. NPR. The Bald Eagle is usually quite sensitive to human activity while nesting, and is found most commonly in areas with minimal human disturbance. 1972: The United States bans the pesticide DDT. ">1940: Congress passes the Bald Eagle Protection Act. From there, eagles would ingest the fish and effectively consume the poison. “Bald eagles were officially declared an endangered species in 1967 in all areas of the United States south of the 40th parallel, under a law that preceded the Endangered Species Act of 1973. Bald eagles in Alaska were never endangered like the ones in the lower 48. Washington Post. Weigh an average of 14 pounds (6.3 kilograms), though females are larger than males, Feature a wingspan between 5.5 and 8 feet (1.6 and 2.4 meters), Build nests weighing up to 1,000 pounds (453 kilograms). However, conservationists later classify the Sonoran Desert bald eagle as threatened in 2008. "Bald Eagles to Be Taken Off Endangered List." 1962: Congress later amends the act to include the golden eagle, renaming it the Bald Eagle and Golden Eagle Protection Act. The bald eagles have to build their nests near marshes, rivers and lakes where they can easily hunt for fish. Since the hatchlings couldn't survive, the number of bald eagles shriveled accordingly.

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