Do sparrows harm people or property?
Initially brought from overseas to keep insects from interfering with agricultural production, house sparrows were soon eating the very crops they were supposed to be protecting. As pests to farmers, sparrows also make their way into livestock food and water supplies, which contaminates both. Due to the ability of birds to transmit diseases like histoplasmosis and salmonellosis, both livestock and humans are in danger of contracting serious illnesses if they come into contact with sparrow droppings. Typically, the birds do not harm humans directly, although they are known to swoop if they feel their offspring are being threatened.