Tableland of Mexico.
Races form two groups, E “curvirostre group” and less distinctly marked W “palmeri group”; groups intergrade somewhat in SW USA (Arizona). Genetic studies#R#R suggest that the two groups may represent separate species, but differences in morphology all minor, although call note relatively distinct#R. Form insularum (currently in “palmeri group”) may represent a further group, being morphologically distinct, but haplotypes from Tiburón I found to be intermixed within palmeri clade#R; synonymized with palmeri in some recent world lists#R. Race celsum poorly differentiated, perhaps not distinguishable. Possible undescribed taxon in extreme S of range in S Puebla and Oaxaca (“Oaxaca Thrasher”)#R; study needed. Seven subspecies currently recognized.
Food and feeding
Status and conservation
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