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
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.