Thanks to global warming, arctic ice are shrinking and their habitats are going away fast.

http://seattlepi.nwsource.com/opinion/100332_orcalisting18.shtml

Tigers are an endangered species; only about 5000 to 7400 tigers are left in the wild.

We as humans have been hunting them for food and for their fur. It has to stop.

The article from the link provided below talks about the crisis we have on our hands. When bees go, honey goes as well. Our grandchildren might not be able to taste natural honey. (I say that because I am sure by then humans would figure out a way to make synthetic honey)
http://insects.suite101.com/article.cfm/bee_crisis

See the link below for a list of butterflies. When butterflies die off, no more means of transporting pollens, thus wildflowers go as well. This is an alarming problem.
http://www.prairiefrontier.com/pages/butterflies/endangered.html