Formerly placed in monospecific genus Chlorestes, but morphology and bioacoustics indicate that merging into Chlorostilbon is more appropriate. Author and year of scientific description of species have continually been misquoted. Racial variation complex and possibly not constant; intermediate populations exist. Birds of Brazil S of Amazon formerly awarded race cyanogenys. Two highly doubtful forms are known only from trade skins (one and two, respectively) from Bahia: C. subcaeruleus is probably a hyperchromatic aberration of present species; C. hypocyaneus may be a mutant of present species, or hybrid of present species with Hylocharis cyanus, or possibly even a valid species. Also, form Eucephala scapulata, known from single specimen from French Guiana, is probably a hybrid of present species with Thalurania furcata. Three subspecies currently recognized.
Food and feeding
Status and conservation
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