Tyrannus vociferans vociferans Status: Fairly common regular spring and fall migrant west, rare casual central. Fairly common regular breeder west. Documentation: Specimen: UNSM 6360, 19 Sep 1919 Glen, Sioux Co. This specimen was stated by the collectors to have been taken 9 Sep (Mickel and Dawson 1920). Taxonomy: Recently, Chesser et al (2018) rearranged the […]
NORTHERN FLICKER
Colaptes auratus auratus, C. A. LUTEUS, C. a. COLLARIS (cANESCENS) Status: “yellow-shafted flicker”: Common spring and fall migrant east and central, uncommon west. Common breeder east and central, uncommon west (Pine Ridge, North and South Platte river valleys). Fairly common winter visitor east and central, uncommon west. “red-shafted flicker”: Common winter visitor (altitudinal movement from Rocky […]
WESTERN WOOD-PEWEE
COntopus sordidulus veliei Status: Increasing. Common regular spring and fall migrant west, locally rare west central, rare casual elsewhere. Common regular breeder west, locally rare west central. Documentation: Specimen: UNSM ZM6396, 24 May 1900 Monroe Canyon, Sioux Co. Taxonomy: Four subspecies are recognized (AviList 2025), two north of Mexico: saturatus from southeast Alaska to western […]
OLIVE-SIDED FLYCATCHER
Contopus cooperi cooperi Status: Uncommon regular spring and fall migrant east, west, and Platte River Valley, rare elsewhere in central. Documentation: UNSM 6401, 14 Jun 1901 Warbonnet Canyon, Sioux Co. Taxonomy: AOU (1998) noted that this species was previously placed in the monotypic genus Nuttallornis, as N. borealis. Nuttallornis is now merged with Contopus, where […]
PEREGRINE FALCON
Falco peregrinus anatum, F. p. tundrius Status: Uncommon regular spring and fall migrant statewide. Locally uncommon regular resident east, extirpated west. Rare casual winter visitor statewide. Documentation: Specimens: UNSM ZM7696 (anatum) 14 May 1915 Garden Co; UNSM ZM7695 (tundrius) 5 May 1935 near Stapleton, Logan Co. Taxonomy: There are 18 subspecies recognized world-wide (AviList 2025), […]
AMERICAN THREE-TOED WOODPECKER
Picoides dorsalis dorsalis Status: Rare casual summer visitor west. Documentation: Specimen: UNSM ZM6345, 16 Jun 1916 Scotts Bluff Co (Swenk 1918). Taxonomy: Nearctic Picoides dorsalis American Three-toed Woodpecker is split from the Palearctic species P. tridactylus Eurasian Three-toed Woodpecker based on genetic and vocal differences (Banks et al 2003). Three subspecies are recognized (AviList 2025): fasciatus […]