One of the small hermits sometimes separated in genus Pygmornis. Often considered conspecific with P. longuemareus, but morphological characters indicate that closest relationship is to P. griseogularis; race saturatus in particular is extremely similar to P. g. griseogularis. Other close relatives include P. atrimentalis, P. ruber and P. stuarti. Race saturatus sometimes treated as a separate species. Name adolphi predates saturatus, but is preoccupied; adolphi subsequently replaced by cordobae, but this, in turn, becomes junior synonym of saturatus. Proposed race nelsoni (Panama) judged invalid, as claimed differences fail to take into account age- and sex-related variation in saturatus. In NW Colombia, races saturatus, subrufescens and striigularis come together in a zone of character introgression. Four subspecies currently recognized.
Food and feeding
Status and conservation
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