Written and illustrated by David Allen Sibley, America"s most widely respected bird illustrator and ornithologist, these FoldingGuides offer instant access to just what birders need to know. All 18 North American species of hummingbord are covered, including multiple illustrations, descriptive captions, size, detailed range maps, and seasonal presence. Includes illustrated information on hummingbird behavior including identification,hovering methods, feeding, and nesting.