Aythya collaris x marila Status: Rare casual fall migrant. Record: There are two records. The first was of one along the south Shore of Lewis and Clark Lake, Knox Co 11 Dec 2020 (Strand, eBird.org). The observer’s description reads: “Adult male. Scaup with clean pale whitish flanks and a contrasting black back, similar in size […]
WESTERN GULL
Larus occidentalis Status: Accidental in spring (Mlodinow, Brenner; Brogie 2024). Documention: Photograph and description: 7 Apr 2023 Lake Minatare, Scotts Bluff Co (Mlodinow, Brenner; eBird.org). Taxonomy: There are two subspecies (AviList 2025), occidentalis of the Pacific Coast from Farallon Islands north to northwestern Washington, and wymani of the Pacific Coast from Monterey Bay to Isla […]
Ring-necked Duck x Lesser Scaup (hybrid)
Aythya collaris x affinis Status: Rare casual spring migrant. Record: There are six records. 10 Mar 2022 Lake Ogallala, Keith Co (Mlodinow, eBird.org) 13-14 Mar 2023 North Platte, Lincoln Co (Manning, eBird.org) 21 Mar 2023 Lake McConaughy, Keith Co (Mlodinow, eBird.org) 1 Apr 2021 Gavin’s Point Dam in Knox Co (Strand, eBird.org) 7-26 Apr 2023 […]
Tufted Duck x Lesser Scaup (hybrid)
Aythya fuligula x affinis Status: Accidental in spring. Record: A first state record of this hybrid was photographed at Gavin’s Point Dam in Knox Co 13 Apr 2021 (Strand et al, eBird.org). Comments: Tufted Duck hybridizes with other species of Aythya (Carboneras and Kirwan 2020). There are numerous records shown in eBird (eBird.org, accessed Jun […]
Blue-winged Teal x Northern Shoveler (hybrid)
Spatula discors x clypeata Status: Accidental in spring. Documentation: Photograph: 17 May 2021 Antelope Co (M. Brogie, eBird.org). Comments: This is a known hybrid; Northern Shoveler hybridizes with a few other species, including Blue-winged Teal (Dubowy et al 2020). eBird (eBird.org, accessed Mar 2024) shows numerous records of this hybrid across the US, but only […]
BROAD-BILLED HUMMINGBIRD
Cynanthus latirostris Status: Accidental in spring. Documentation: Photograph: 15 May 2021 Wilderness Park, Lancaster Co (Brogie 2022). Taxonomy: Current authorities (AviList 2025) split two of the former five subspecies as full species lawrencei Tres Marias Hummingbird and doubledayi Turquoise-crowned Hummingbird, leaving three subspecies in C. latirostris, one of which, magicus, breeds in southeastern Arizona and […]