If you're a birder, you will love the Internet Bird Collection, a non-profit, volunteer endeavor to collect as much information as possible about birds from all over the world. If you find and photograph or video a bird in the wild, you can upload your findings to the IBC and share it with other bird enthusiasts globally. The Internet Bird Collection offers Statistics, Forums, Videos, Photos, Sounds - pretty much anything a bird lover could ever want. It's a great way to harness the power of crowds, in this case birders, in order to create something that everyone can use.
More Web resources that are volunteer driven