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A data frame of state codes used by eBird. These codes are 4 to 6 characters, consisting of two parts, the 2-letter ISO country code and a 1-3 character state code, separated by a dash. For example, "US-NY" corresponds to New York State in the United States. These state codes are required to filter by state using auk_state().




A data frame with four variables and 3,145 rows:

  • country: short form of English country name.

  • country_code: 2-letter ISO country code.

  • state: state name.

  • state_code: 4 to 6 character state code.


Note that some countries are not broken into states in eBird and therefore do not appear in this data frame.

See also