Engraved drawing of the Gyrfalcons (Falco rusticolus), from the book 'Birds of New York' by Elon Howard Eaton, 1914. Courtesy Internet Archive. ()This image was created from the Internet Archive Books Images project (https://www.flickr.com/photos/internetarchivebookimages/) through a collaboration between the Internet Archive and Gado Images. The descriptions and keywords from this image were created by Gado Images' professional research team.