The Sibley Field Guide to Birds of Eastern North America Obsidian Chrysoprase is a stone of

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The Sibley Field Guide to Birds of Eastern North America Obsidian Chrysoprase is a stone ofSecond Edition By David Allen Sibley Now completely revised and updated the indispensable resource for all birders seeking an authoritative guide to the birds of the East in a portable format they will want to carry into the field. Compact and comprehensive, this guide features 650 bird species, plus regional populations, found east of the Rocky Mountains. Entries include stunningly accurate illustrations more than 4,601 in total with descriptive