Frank M. ChapmanDied 15 Nov 1945 at age 81 (born 12 Jun 1864). Frank M(ichler) Chapman was an American ornithologist famous for his extensive and detailed studies of the life histories, geographic distribution, and systematic relationships of North and South American birds. He joined the American Museum of Natural History in 1888, where he spent his life. By 1920, he was the first Chairman of the newly created Department of Birds. Chapman did pioneer work on Neotropical biogeography. Sensitive to the living environment of birds and other animals, he developed the "habitat group" as a means of display in the Museum, a feature now widely adopted by other museums through the world. A leading conservationist, Chapman was a prolific author who popularized bird study and raised awareness for conservation in the U.S.