Pet stores, aviaries and private breeders legally sell parrots in the United States, and buyers can verify a bird's legality by obtaining proper documentation from the seller. For imported parrots, an official CITES permit and a U.S. Fish and Wildlife Service declaration form guarantee that the bird is legal.
The declaration form from the FWS should include the parrot's country of origin, permit number and date of import, among other information.
Some parrots that were bred in the United States have closed bands around their legs that provide information about their breeding facility and background. Although parrot breeders in the United States don't have to use any specific documentation by law, established breeders keep records of their birds through these closed bands.