ダウンロード National Geographic Field Guide to the Birds of North America, Sixth Edition 本

National Geographic’s iconic, best-selling guide for birders and birding enthusiasts of all levels includes unique subspecies maps never before seen in a field guide; extensive migration information overlaid on species maps; field-mark labels on all artwork; text updates with new species; reorganization reflecting taxonomic changes in the bird community; organization, readability, and increased page count.