S. F. Baird, 1854,
Bill Williams Fork of Colorado River, Arizona, USA.
Sometimes separated with other barred congeners in Centurus. In past considered conspecific with M. hypopolius. Interbreeds to limited extent with M. aurifrons in SW Mexico. Geographical races poorly differentiated owing to rather marked degree of individual variation; dark individuals from S Sonora, SW Chihuahua and N Sinaloa often separated as race fuscescens, but probably better treated as part of nominate or, since many appear indistinguishable from cardonensis, should perhaps be merged with latter; further study needed. In addition, described races albescens (from S Nevada and SE California to NW Sonora), tiburonensis (Tiburon I, off W Sonora) and sulfuriventer (from S of range, S from Sinaloa and Zacatecas) fall within range of variation of nominate, with which they are here synonymized. Three subspecies recognized.
Food and feeding
Status and conservation
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