It breeds in colonies, but also individually. In settled areas it occupies chimneys of buildings and recesses and holes in the walls of ruins and churches. Parks with stands of old-growth trees with holes in them are also colonised. As its feeding grounds during the breeding season, the Jackdaw prefers short-grass meadows rich in insects in the vicinity of the breeding site. Outside the breeding season the Jackdaw covers greater distances in its search for food.
Jackdaws are versatile omnivores but especially insectivores.
They adapt to supply and availability. While breeding and raising the young, large insects are especially important. In the cold half of the year, grain sprouts and grass seeds but also windfall fruit are eaten. The whole year round they consume all kinds of wastes. This project was sponsored and realized by IBM Austria and Lotus .