This site offers bird checklists developed by others that indicate the seasonal occurrence of birds in state, federal, and private management areas, nature preserves, and other areas of special interest in the United States.
The Encyclopedia of Life is an ambitious project to organize and make available via the Internet virtually all information about life present on Earth. At its heart lies a series of Web sites - one for each of the approximately 1.8 million known species. Each site is constantly evolving and features dynamically synthesized content ranging from historical literature and biological descriptions to stunning images, videos and distribution maps.
The Tree of Life is a project containing information about the diversity of organisms on Earth, their history, and characteristics. The information is linked together in the form of the evolutionary tree that connects all organisms to each other.