Theodore Roosevelt had a life long interest in birds. An author of 35 books on history, hunting, naval history and tactics, political commentary and criticism, his first published work was actually an 1870's monograph of birds of Franklin County in upstate New York. This was followed by a short monograph of birds in Oyster Bay, New York.
In a recent survey, a total of 116 species were documented at Sagamore Hill. A full species list can be downloaded here.