May 21: Endangered Species Day

This Friday, you can join the U.S. Fish & Wildlife Service and many conservation groups in celebrating America's conservation efforts to help threatened and endangered species.

Four signature events are scheduled in San Francisco, Washington D.C., Maine and Montana, and many FWS offices around the country held events last weekend, with more on the schedule for this weekend. Another list of events is available here.

Do you know when the Bald Eagle was "delisted"

or removed from the Endangered Species List? 2007

Want to test your knowledge of endangered species? Take this 12-question test.