Black Redstart

The black redstart is 13–14.5 centimetres long and weighs 12–20 grams, similar to the common redstart. The adult male is dark grey to black above with a black breast, an orange-red lower rump and tail, and two dark red-brown central tail feathers. In the western subspecies the belly is blackish-grey and there is a whitish panel on the wing; in the eastern subspecies the belly and undertail are orange-red and the wings are all blackish. (Wikipedia, general species account)

A widespread breeder in rocky habitats across Eurasia and North Africa, from the British Isles south to Morocco and east to central China, it is resident in the milder parts of its range, while north-eastern birds migrate to winter in southern and western Europe, Asia and North Africa. It nests in crevices or holes in buildings. In Britain it is mostly a passage and winter visitor, with only 20–50 breeding pairs. (Wikipedia, general species account)