B. Meyer, 1822,
Formerly listed as L. leucopterus. Closely related to L. argentatus, and in past sometimes treated as conspecific. Taxonomic position of birds formerly recognized as race “kumlieni” still problematic: has exceptionally been considered a separate species, as birds with grey wingtips occur alongside those with white wingtips in Nearctic; on the other hand, current tendency (followed here) is to treat it as a glaucoides × L. thayeri hybrid. E–W cline apparent, from pale glaucoides to slightly darker “kumlieni” to darker L. thayeri. Tendency to lump L. thayeri with L. glaucoides now accepted. Two subspecies recognized.
Food and feeding
Status and conservation
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