Determination of residue levels of the avicide Determination of residue levels of the avicide 3-chloro-4-methylaniline hydrochloride in red-winged blackbirds 3-chloro-4-methylaniline hydrochloride in red-winged blackbirds ((Agelaius phoeniceus Agelaius phoeniceus) by gas chromatography-tandem mass) by gas chromatography-tandem mass spectrometry spectrometry