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Endangered? Extinct? Threatened? What’s the Difference?
Our Learning Target I can explain the reasons species become endangered, extinct, or threatened.
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Definitions Endangered
A species of plant or animal that is in immediate danger of becoming extinct and needs protection to survive. Threatened A species is likely to become endangered if it is not protected
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Definitions Extinct A species of plant or animal that is no longer living.
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Study Jams-Population Growth
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Passenger Pigeon – Now Extinct
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Dusky Seaside Sparrow Last of these birds died in 1987
Sparrows lost their homes as marshes were destroyed/
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Endangered… An endangered species is one that is getting close to extinction. Black Rhino of Africa
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Endangered… Gray wolves are also endangered in most of 48 states.
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Threatened… A threatened species is just a step behind, and may soon become endangered if we don't help.
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Threatened… African Elephant Poachers cut off their ivory tusks to make carvings and sell them for money.
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In 1973, the Endangered Species Act was passed by our government to protect disappearing plants and animals.
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More than 900 species of plants and animals in the U. S
More than 900 species of plants and animals in the U.S., and more than 530 species living in other parts of the world, are protected by the Endangered Species Act.
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Ways That Species Become Endangered or Threatened
Habitat loss Unregulated or illegal killing or collection Pesticides, pollution Competition with other species Disease Predation
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Threatened… It is because of habitat loss that spotted owls are threatened.
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Threatened… Different aged trees like this are perfect for owls nests, food, shelter and protection from predators.
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Endangered Means There’s Still Time
The spotted owl's problem started years ago when old growth forests were cut faster than they could regrow.
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Endangered? It is also because of habitat loss that whooping cranes are endangered.
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Endangered? Whooping cranes need wetlands for food and protection.
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Endangered? Historically, wetlands were considered wastelands, suitable only for mosquitoes and draining.
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Endangered? When wetlands are drained of all their water, this is habitat loss.
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Endangered? Tigers are endangered because of habitat loss and illegal killing.
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Endangered? Certain human activities are also the main problem facing the endangered manatee, or sea cow.
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Endangered? The use of a dangerous pesticide called DDT caused bald eagles to begin laying eggs with shells so thin they often broke.
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Endangered, Threatened, or Extinct Animal Research
It’s Your Turn… Endangered, Threatened, or Extinct Animal Research Black Rhino Hawksbill Turtle Mountain Gorilla Malayan Tiger Sumatran Elephant Blue Whale Bluefin Tuna Chimpanzee Whale Shark African Elephant Snow Leopard Albacore Tuna Polar Bear Great White Shark Giant Tortoise Giant Panda
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Exit Slip What is the difference between endangered, extinct, and threatened? What are some factors that can contribute to this?
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