As of Earth's Endangered Creatures List as of May 21, 2010 there are 10,801 endangered animals.
because of the humans
Too numerous to mention here, a good source is the IUCN Redlist, which lists the status of all known species.
no
Wolves are one great example.
10000000
yes they are
blue whales
habitat loss
yes they might be
less food, destroying their homes
many whales are endangerd encluding the orca