 The original edition of "The Birds of America" (sometimes called the Havell Edition after its printer, and sometimes called the "Double Elephant Folio", because of its size) was printed on handmade paper 39.5 inches tall by 28.5 inches wide.The principal printing technique was copperplate etching, but engraving and aquatint were also used.Colorists applied each color in assembly-line fashion (over fifty were hired for the work).