¹Taxonomy follows AOU 7th edition (1998) and supplements through Chesser et al. (2017). Subspecies follow Gibson and Withrow (2015) and Andres et al.(2012b). Subspecific inferences for rare migrants and visitants that are not specimen-based rely on expert opinion.

*Denotes extralimital visitants or migrants that have, or probably have, bred in Alaska.

²Status follows Gibson and Withrow (2015) and Gibson et al. (2018). Common/Regular Breeder: those species that breed regularly throughout a portion of Alaska. Rare/Sporadic Breeder: those species that nest peripherally, but regularly, in Alaska. Migrant: those species that occur regularly in Alaska primarily/exclusively as migrants (status Rare) but do not nest regularly and are more regular/numerous than an Extralimital Visitant. Extralimital Visitant: those species that occur in Alaska irregularly (status Casual or Accidental).

³Provenance: Nearctic: those species that nest primarily in the Nearctic and are generally New World during annual cycle. Palearctic: those species that nest primarily in the Palearctic and are generally Old World during annual cycle.

⁴ Likely extinct (Andres et al. 2012b).