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DRC-1339 is a slow-acting avicide registered by the Animal and Plant Health Inspection Service's (APHIS) Wildlife Services (WS) program for the control of blackbirds, starlings, pigeons, crows, ravens, magpies, and gulls. Only WS certified applicators, or persons working under their direct supervision, can apply this avicide. WS has five DRC-1339 products registered with the U.S. Environmental Protection Agency (EPA) to use for bird problems that cannot be resolved by Starlicide Complete (EPA Reg. No. 67517-8) or other commercially available products. The Compound DRC-I 339 Concentrate-Feedlots (1339-FL) registration provides alternate baits for controlling blackbird and starling problems at feedlots and allows baits to be prepared at the use site.