Owls Tawny Owl, Perthshire (R Challis) This family of raptors, the Strigiformes, have largely nocturnal habits. The SRMS monitors five of the 17 species which occur in Britain & Europe. Click on the links below to find out more about each of these species. Barn Owl Tyto alba Little Owl Athene noctua Tawny Owl Strix aluco Long-eared Owl Asio otus Short-eared Owl Asio flammeus