Expected subspecies in the United States. From Cornell's Birds of the World species account:

C. p. pertinax of Arizona, New Mexico, and w. and central Mexico is the larger subspecies (see Measurements, below). It includes paler birds from northern part of range named C. p. pallidiventris by Ridgway (Ridgway 1907) and recognized by Traylor (Traylor 1979d).

Nesting well within the subspecies' geographic distribution.

Following the Cornell Birds of the World species account, which in turn follows Browning (Browning 1977b, Browning 1990), Rea (Rea 1983a), and Binford (Binford 1989a).

Contopus sordidulus veliei

Distribution
E Alaska S through interior mainly to N and C Mexico (N Baja California and S to Michoacán and Puebla), E in USA to N and W Great Plains states and S to W Texas; winters probably W South America (S possibly to Peru, Bolivia and perhaps N Argentina).

Nesting well within the subspecies' geographic distribution.

Following the Cornell Birds of the World species account, which in turn follows Browning (Browning 1977b, Browning 1990), Rea (Rea 1983a), and Binford (Binford 1989a).

Contopus sordidulus veliei

Distribution
E Alaska S through interior mainly to N and C Mexico (N Baja California and S to Michoacán and Puebla), E in USA to N and W Great Plains states and S to W Texas; winters probably W South America (S possibly to Peru, Bolivia and perhaps N Argentina).

Nesting well within subspecies' geographic distribution.

From Cornell's Birds of the World species account:

Dryobates albolarvatus albolarvatus

Systematics History
D. a. albolarvatus (Cassin, 1850) [type locality = Oregon Canyon, California, USA].

Distribution
South-central British Columbia south, discontinuously in mountains, to Washington, western Idaho, Oregon, California (south in Coast Ranges of northwestern California to Colusa County, and along Sierra Nevada in eastern California), and extreme western Nevada.