The Endangered Species Act (ESA) was passed in 1973 to protect animals who are in danger of becoming extinct. Five factors are looked at when considering to declare a species endangered: 1) habitat destruction 2) overutilization of species for commercial, recreational, scientific, or educational purposes 3) disease or predation 4) lack of current protection and 5) other natural or manmade factors that threaten the species. Endangered animals include killer whales, humpback whales, blue whales, jaguars, ocelots, eastern pumas, gray wolves, California condors, whooping cranes, leatherback sea turtles, and many more. For the full list, check out the U.S. Fish and Wildlife Service website at http://www.fws.gov.
This website lists all of the endangered animal and plant species. You can look at the different continents and other areas like Hawaii that have a significant number of endangered species. It also can separate them into types of animals: mammals, amphibians, etc.
One thing I found really interesting and disturbing is the number of species out there. There are millions of different species in the world, but seeing how many are endangered made that number seem more real to me.
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