South Carolina, USA.
Generally thought to be closest to M. kennicottii, M. seductus and M. cooperi, and often considered to include last two of those as races. Formerly treated as conspecific with M. kennicottii, and the two occasionally interbreed where ranges meet or overlap (separated by 60 km in Oklahoma “panhandle”, slightly sympatric in Colorado Springs, broadly overlapping in Texas, areas of contact in Mexico undetermined)#R; recent genetic studies, however, indicate that present species and M. kennicottii form two distinct monophyletic clades#R and should therefore be treated as separate species, as suggested by vocal and morphological differences. Geographical limits of listed races require further study; naevius sometimes merged with nominate. Race lambi previously treated in HBW (and elsewhere#R) as race of M. cooperi, but the two are sympatric; treated as full species in recent monograph#R and by subsequent author#R, but voice like that of present species. Additional described races probably reflect no more than individual variation or refer to intermediates: swenki (of SC Canada to Oklahoma) included in maxwelliae, and semplei (from C Mexico) in mccallii. Seven subspecies recognized.
Food and feeding
Status and conservation
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