Documentation is lacking or inconclusive.

King Eider Somateria spectabilis
Gray Hawk Asturina nitida
Northern Goshawk Accipiter gentilis atricapillus
Short-tailed Hawk Buteo brachyurus
Common Black-Hawk Buteogallus a.anthracinus
Mountain Plover Charadrius montanus
Curlew Sandpiper Calidris ferruginea
Ruff Philomachus pugnax
Long-tailed Jaeger Stercorarius longicaudus
Thayer's Gull Larus thayeri
Iceland [Kumlien's] Gull Larus glaucoides kumlieni
Kelp Gull Larus dominicanus
Red-billed Pigeon Columba flavirostris
Snowy Owl Nyctea scandiaca
Vaux's Swift Chaetura vauxi
Sulphur-bellied Flycatcher Myiodynastes luteiventris
Tropical Kingbird Tyrannus melancholicus
Cassin's Vireo Vireo cassinii
Fish Crow Corvus ossifragus
Sage Thrasher Oreoscoptes montanus
Connecticut Warbler Oporornis agilis
Red-faced Warbler Cardellina rubrifrons
Painted Redstart Myioborus pictus
Brewer's Sparrow Spizella breweri
White-collared Seedeater Sporophila t.torqueola
Bachman's Sparrow Aimophila aestivalis
Botteri's Sparrow Aimophila b.botterii
Rufous-crowned Sparrow Aimophila ruficeps
Baird's Sparrow Ammodramus bairdii
Dark-eyed [Gray-headed] Junco Junco hyemalis caniceps

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