I've updated
http://StockerPhotos.com/BirdCodes/
to reflect changes made in the 56th supplement to the American
Ornithologists' Union check-List of North American birds published
in 2015.
The page offers a convenient mechanism for matching English bird
names, scientific bird names, 4-letter codes derived from English
names, and 6-letter codes derived from scientific names. Data were
downloaded from the two sources in early August 2015: the Institute
for Bird Populations (IBP) and the Bird Banding Laboratory (BBL).
The IBP list prepared by Peter Pyle and David F. DeSante is intended
to cover all birds found in North America, Central America, and the
Caribbean. All its entries are included in the data set.
The BBL list covers a wider variety of birds (including penguins for
example) but covers fewer species. The BBL list was merged with the
IBP list by matching scientific and/or English names. In cases where
there was a discrepancy names from the IBP list were used. Unmatched
BBL entries that included scientific names were also merged into the
data set in approximate phylogenetic order. The combined list which
includes some hybrids and subspecies contains 2322 entries.
Enjoy.
Bob Stocker
Denver