This clever bird identification key was created by Eric Haines, a birding enthusiast and professional in the field of computer graphics. The online key focuses on birds found in eastern sections of the United States and Canada and is based on _Quick-Key Guide to Birds_ by John T. Emlen, and David Archbald. Site users can pinpoint numerous bird species by selecting specific characteristics under such categories as Action (e.g. Swimming, Hopping or Climbing); Size (e.g. Larger Than Robin, Smaller Than Robin); Habitat (e.g. Wood, Marsh, Field); Markings (e.g. Eye Ring, Crown Patch); and more. Bird profiles list basic distinguishing characteristics, and link to images of the bird in Google Images. This website also links to a Bird Quiz Program that can be self-tailored to suit the preferences of different quiz-takers and to identification keys for trees and wildflowers.