Checklist Codes

Code-1 and Code-2: Regularly occurring North American avifauna.
Includes regular breeding species and visitors. There is no firm designation between Code-1 and Code-2 species, except that logically Code-1 species are more widespread and are usually more numerous. Code-2 species have a restricted North American range, are more widespread, but occur in lower densities, or are quite secretive making their detection often difficult. We readily acknowledge that some Code-2 species are harder to find than some species that have higher codes.

Code-3: Rare.
Species that occur in very low numbers, but annually, in the ABA Checklist Area. This includes visitors and rare breeding residents.

Code-4: Casual.
Species not recorded annually in the ABA Checklist Area, but with six or more total records—including three or more in the past 30 years—reflecting some pattern of occurrence.

Code-5: Accidental.
Species that are recorded five or fewer times in the ABA Checklist Area, or fewer than three records in the past 30 years.

Code-6: Cannot be found..
The species is probably or actually extinct or extirpated from the ABA Checklist Area, or all survivors are held in captivity (or releases are not yet naturally re-established).

For more information on Birding Codes please see pages 13-14 of “ABA Checklist: Birds of the Continental United States and Canada” Sixth Edition 2002.

Enter or View List Totals

REGISTERED USERS

Archives

  • ABA Blog
  • The Eyrie
- David Hartley

The 2016 ABA’s Big Year Membership Contest has come to a close and all of the prizes have been award [...]

- Nate Swick

2017 is a new year, and time for new bird taxonomy proposals submitted to what was formerly called t [...]

- Nate Swick

The American Birding Association has been proud to support the American Birding Expo, a showcase for [...]

- The Eyrie

In 2014 I was given the opportunity to go birding for the first time as part of a new All About Bird [...]

- The Eyrie

Did you know the Bar-tailed Godwit has the longest non-stop, flapping flight migration of any bird i [...]

- The Eyrie

See the 2016 North American Ornithological Congress through the eyes of a young birder. [...]

ABA Marketplace

No items.