“Table land” [of Mexico] = Temascaltepec, México State, Mexico.
DNA data indicate that species is sister to I. pustulatus. In the past usually treated as conspecific with I. galbula and I. abeillei. Hybridizes extensively with former in a belt from S Canada (Alberta and Saskatchewan) S in Great Plains to S USA (Oklahoma and Texas), but assortative mating (or selection against hybrids) evident at several locations. Smaller race parvus possibly unworthy of recognition, and size difference within species apparently clinal; retained pending further study. Proposed race eleutherus (from N Texas, in S USA), supposedly more orange than nominate, considered to fall within range of variation of latter. Species was explicitly named to honour both father and son Bullock, so original, singular spelling requires emendation to current plural form#R#R. Two subspecies tentatively recognized.
Food and feeding
Status and conservation
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