Black redstart

Typical for this migratory bird is the slight trembling of the tail and the kinking.
It is loyal to its territory and likes to use half-cave nesting boxes on the wall of a house under the roof.
Originally an inhabitant of rocky landscapes, it increasingly regards buildings in towns and villages as substitute rocks.
The breeding season is from May to June, often 2 annual broods with 4-6 eggs.
It builds its nests from moss and stalks in wall recesses and half-caves