Master list for 4 letter alpha codes

[Henry D Mauer]

The ABA checklist covers all birds in the US, including rarities, and has alpha codes for each species.  The checklist is at:  https://www.aba.org/wp-content/uploads/2020/03/ABA_Checklist-8.0.8.pdf    The list also has each scientific name and rarity codes as well.

For those who have it, the National Geographic field guide has alpha codes along with each species description.

Henry Mauer

Harpswell