• Alpha Codes for AOU checklist - Four-letter (for English common names) and six-letter (for scientific names) species alpha codes were developed by Pyle and DeSante 2003 (Pyle, P., and DeSante, D.F. 2003. Four-letter and six-letter alpha codes for birds recorded from the American Ornithologists Union Check-list area. North American Bird-Bander 28:64-79) to reflect A.O.U. taxonomy and nomenclature (A.O.U. 1998) as modified by Supplements 42 (Auk 117:847-858 (2000)) and 43 (Auk 119:897-906 (2002)).HTML
• Pyle Identification Guides identification guides are available from Slate Creek Press. For further information about the guides and how to order a copy, click here

MAPS

MoSI

Tropical

Sierra Nevada

Avian Inventory

Burrowing Owl

Bird Populations Journal

Alpha Codes

Pyle Guides