This section is from the book "The Balance Of Nature And Modern Conditions Of Cultivation", by George Abbey. Also available from Amazon: The Balance Of Nature And Modern Conditions Of Cultivation.
Like the rook, this bird sometimes acquires a taste for fruit, probably from scarcity of its usual animal food, but, though occasionally devouring cherries, does but little injury to fruit. The jackdaw's depredations are mostly confined to the game and poultry-rearing grounds, it devouring eggs of pheasants and partridges and away laying hens; also very prone to pilfer young birds. A sharp look-out must be kept for this bird by game and poultry rearers, attracting by a little extra food as bait and there setting traps, or better, shooting the depredators. The number of jackdaws are so few as compared with rooks that neither foresters nor graziers need lament deprivation of their services in destroying pests.