It is endangered because it has lost more than half its total population in the past 60 years.

Help your students understand the gravity of extinction with these classroom resources.The theory of natural selection was explored by 19th-century naturalist Charles Darwin. Noun. What if we lose hundreds? This seabird is native to the coasts of North America and South America, as well as the islands of the Caribbean Sea. Ihre zuletzt angesehenen Artikel und besonderen Empfehlungen Amazon berechnet die Sternbewertungen eines Produkts mithilfe eines maschinell gelernten Modells anstelle des Durchschnitts der Rohdaten. Noun. Washington, D.C.: National Geographic Society.For information on user permissions, please read our If a media asset is downloadable, a download button appears in the corner of the media viewer.

© 1996-2015 National Geographic Society, © 2015- This small frog is native to southern Ethiopia in Africa. If no button appears, you cannot download or save the media.Text on this page is printable and can be used according to our Any interactives on this page can only be played while you are visiting our website. endangered species.
All rights reserved.An endangered species is a type of organism that is threatened by extinction. An endangered species is a type of organism that is threatened by extinction.

Pesticides can be fungicides (which kill harmful fungi), insecticides (which kill harmful insects), herbicides (which kill harmful plants), or rodenticides (which kill harmful rodents. Also called glacial age.unit made up of governments or groups in different countries, usually for a specific purpose.environmental organization concerned with preserving natural ecosystems and habitats.type of plant or animal that is not indigenous to a particular area and causes economic or environmental harm.tropical ecosystem filled with trees and underbrush.lowest level of conservation, used when the population and habitat of a species are healthy.type of plant with a pod that splits, with seeds in the middle, such as peanuts.one of seven categories of a species' threat of extinction, assigned by the International Union for the Conservation of Nature: least concern, near threatened, vulnerable, endangered, critically endangered, extinct in the wild, and extinct.industry engaged in cutting down trees and moving the wood to sawmills.adult member of a species who is able to reproduce.person who studies patterns and changes in Earth's atmosphere.large cat native to North and South America. Content Created by. Empower your students to learn about genetics with this collection of resources.Scientists at the International Union for the Conservation of Nature (IUCN) use these criteria to group animal populations worldwide.Conservation is the act of protecting Earth’s natural resources for current and future generations. Young chicks were reared in hatching sites, then released into the wild. )lever, either black or white, which triggers a hammer to hit a specific string inside the body of a piano.large region that is higher than the surrounding area and relatively flat.introduction of harmful materials into the environment.rate at which the numbers of a specific species are shrinking.calculation of a species' population and its area of occupancy that helps determine its conservation status.calculation of how long a species can survive without human protection.area of tall, mostly evergreen trees and a high amount of rainfall.list defining the severity and causes of each species' threat of extinction. In those cases, the animal or plant gets limited protections.One animal whose numbers have increased through conservation is U.S. Rep. John Dingell (D-Mich.), who wrote the Endangered Species Act, argued that “only natural extinction is part of natural order.” Scientists believe that 227 species—including the grizzly bear, the peregrine falcon and the gray wolf—were saved from extinction in the first 33 years of the law’s existence.Luckily for endangered species, there are many people looking out for them.

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