Morphologically similar to A. otus, but studies of proteins indicate unusually large genetic distance between them#R. Sometimes thought to be closely related to A. capensis, which replaces it ecologically in Africa, but resemblance seems superficial and probably due to convergence, and vocalizations very different. Much darker race galapagoensis possibly specifically distinct, and treated as such by recent author#R on grounds of genetic and behavioural distinctiveness (and with apparent vocal differences, although these are not mentioned in the taxonomic evaluation); galapagoensis notably smaller than adjacent Ecuadorian populations (score perhaps 2) and generally darker, but one specimen from Pichincha (NHMUK 1918.104.22.168) is as dark (so no score) and otherwise no obvious distinctions apparent, while behavioural differences involve hunting techniques and suggest simply ecological plasticity. Race domingensis was formerly considered a separate species, including portoricensis (and later also cubensis) as a race; alternatively, first two have been considered a single race of present species. Race pallidicaudus sometimes included in bogotensis. Eleven subspecies recognized.
Food and feeding
Status and conservation
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