Featured Hand-rearing AT HAIDLHOF We hand-raised 10 young ravens to study key aspects of their social, cognitive, and communicative development. The chicks were selected from nests of captive breeding pairs at Haidlhof Research Station, the Konrad Lorenz Research Center, Zoo Vienna, and Alpenzoo Innsbruck. From nests containing four chicks, two were hand-raised while two remained…