Other significant publications include the `` AOU Checklist of North American Birds '' , which is the standard reference work for the field , and a monograph series , `` Ornithological Monographs '' .
Some of its other big publications are the `` AOU Checklist of North American Birds '' and a series , `` Ornithological Monographs '' . The AOU Checklist of North American Birds is the standard reference for the field .