Ammodromus [sic] ruficeps
Calaveras River [east of Stockton], California, USA.
Geographical variation rather poorly marked. For convenience, races sometimes divided into “Pacific-coast group” (nominate, canescens and obscura), “SW-desert group” (eremoeca and scottii), and “Mexican group” (remaining races); most races in last group are very poorly differentiated, and some intergrade with members of second group, rendering recognition of groups at best doubtful. Race eremoeca intergrades with scottii in W Texas and with pallidissima in N Mexico (Coahuila), and last two may be synonyms of eremoeca; likewise, boucardi intergrades with eremoeca in E Mexico; in W Mexico suttoni intergrades with (and perhaps better subsumed into) extima and may intergrade also with fusca, and latter intergrades in SW Guanajuato with simulans, from which rupicola is possibly inseparable. Taxonomic review required. Race sanctorum is possibly extinct. Eighteen subspecies recognized.
Food and feeding
Status and conservation
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