The family Corvidae includes crows, ravens, jackdaws, jays, choughs, magpies, treepies, nutcrackers, and ground jays. Birds filmed live on their nests included swallows, buzzards, jays, barn owls and jackdaws. Crow is a bird of the genus "Corvus", which includes jackdaws, ravens, and rooks. Lorenz studied instinctive behavior in animals, especially in greylag geese and jackdaws. The nutcrackers were more accurate in their searches than the jackdaws and pigeons. Pliny notes how the Thessalians, Illyrians, and Lemnians cherished jackdaws for destroying grasshoppers' eggs. Formerly, western jackdaws were simply called "daws". Clark's nutcrackers and jackdaws were compared in a 2002 study based on geometric rule learning. Western jackdaws inhabit wooded steppes, pastures, cultivated land, coastal cliffs, and towns. An archaic collective noun for a group of jackdaws is a "clattering". Based at the Jackdaws Castle training establishment in England. Western jackdaws were notorious as they also favoured fruit, especially cherries. It contains two relatively small species both named jackdaws. Western jackdaws become sexually mature in their second year. The Veneti are fabled to have bribed the jackdaws to spare their crops.