Previously recognized taxa now split into Mexican Whip-poor-will (Antrostomus arizonae
) and Eastern Whip-poor-will (Antrostomus vociferus
; Cink 2002). The Mexican Whip-poor-will breeds in central and southeastern Arizona and southwestern New Mexico (Sibley 2014). The Eastern Whip-poor-will breeds across the eastern U.S. and southern Canada south to the Gulf Coast states (Sibley 2014). A single Antrostomus
sp. individual was observed in northwest Montana in 1990. The Montana Bird Records Committee evaluated reports associated with this observation and concluded that although their was more evidence to support it being a Mexican Whip-poor-will, the specific identity of the bird could not be determined with certainty (Marks et al., 2016).
For a comprehensive review of the conservation status, habitat use, and ecology of this and other Montana bird species, please see Marks et al. 2016, Birds of Montana.