Reduction of starling (Sturnus vulgaris) populations by the use of poisoned baits is frequently suggested, but an effective, nonhazardous toxicant has not been available. A recently discovered chemical, DRC-1339 (3-chloro-p-toluidine hydrochlo-ride), meets many of the requirements; it is highly toxic to starlings (acute oral LD50 =3.8 mg/kg), well accepted, relatively nontoxic to rats, and generally less toxic to most other birds. Hawks are particularly resistant and there appears to be little danger that these birds, or mammalian carnivores, would be killed by eating DRC-1339-poisoned starlings. The margin of safety is less for the game birds that were tested. DRC-1339 causes a slow, nonviolent death; uremic poisoning and congestion of major organs appear to be the principal causes.