0.5% 4-Aminopyridine
Avitrol Mixed Grains is a poison with flock alarming properties used for the control of Feral Pigeons (Columba livia), House Sparrows (Passer domesticus), Red-winged (Agelaius phoeniceus), Yellow-headed (Xanthocephalus xanthocephalus), Rusty (Euphagus carolinus), and Brewers (Euphagus cyanocephalus) Blackbirds, Great-tailed (Quiscalus mexicanus) Boat-tailed (Quiscalus major) & Common (Quiscalus quiscula) Grackles, Brown-headed (Molothrus ater) & Bronzed (Molothrus aeneus) Cowbirds, and European Starlings (Sturnus vulgaris) in, on or in the area of structures, feeding, nesting, loafing and roosting sites, in such a way that a part of a flock may react and frighten the rest away. Birds that react and alarm a flock usually die.