Panda Bears, Jaguar, Cheetah, Leopard, African Wild Dog, Manatee, red wolf, and blue whale, just to name a few. If you would like to see even more than that you can check out http://www.earthsendangered.com/ for more and other endangered animal sites. There are tons of sites, and tons of animals.
Pandas are endangered animals
Endangered animals
The list of endangered Indonesian animals is long... It contains 210 species.
No But some of the animals are
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There are many subtopics concerning species extinction. The impact of species extinction within an ecosystem is one subtopic. Another topic is how animals adapt to their prey becoming extinct.
Animals become endangered at different times, and for different reasons. Some animals that were endangered in the past have already become extinct, for example the dodo. There are some animals that have become extinct in the wild, but that are still found in captivity. And then there are animals that have only recently been classified as endangered. To answer your question properly, you'll need to let us know what animal you are specifically referring to.
some types of whales
some animals being endangered in the coral reef are special types of squid
polar bear, black-footed ferret,
bald egle
the blue whale