(February 27, 2004) - (Undated-AP) -- Arkansas' black vulture population apparently is growing as the birds feast at city and county landfills. The growing population presents problems for livestock owners. Black vultures, unlike turkey vultures, may be more aggressive and damage property and injure or kill newborn, sick or weakened livestock. Federal officials reported 26 complaints in Arkansas last year involving black vultures. But the birds are protected under federal law. Vultures are protected under the federal Migratory Bird Treaty Act and cannot be killed under ordinary circumstances. Anyone having problems with a flock of the birds can apply to the federal Department of Agriculture for a kill permit. But the birds can also be scared away with pyrotechnics and noise makers, such as propane canons.