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Z-ZNR
The Zoological Nomenclature Resource (ZNR) is a database that contains Zoological nomenclature data. Birds of the World -- current valid scientific avian names. Sibley&Monroe; AOU Checklist (7th Ed.); Howard & Moore Checklist 3rd Ed. Subspecies follows Howard & Moore Birds of the World -- historical analysis of taxonomic activity. Website: "http://www.zoonomen.net/"