an Entity references as follows:
This list of birds of the District of Columbia contains 346 species according to Bird Checklists of the World (Avibase) as of June 2021. Of them, 63 are considered rare or accidental, two are extinct, and one has been extirpated. Four have been introduced to North America and another introduced to the eastern U.S. The following tags are used to describe the occurrence of some species: