Feeding ecology of Long-eared Owls in winter: an urban perspective

Capsule Although considered as a specialist predator of Microtus voles, the Long-eared Owl Asio otus may adapt its diet according to the local prey availability. We reviewed the diet of this nocturnal raptor in urban environments during the winter, using studies which reported the ingested biomass relating to different prey categories and so energy intake could be considered. The species was confirmed to feed mainly on Microtus, but in some area rats dominated the ingested biomass.