Occasionally one or few Black vultures are reported from the Gray Ranch, Hidalgo county, New Mexico. Feces Not Applicable Comments on General Food Habits Black vultures feed mostly on carrion, animal wastes, scraps, or garbage. They reported taking 11 vultures in New Mexico in 1988 using leghold traps. However, damage may occur to kidney, lungs and liver. This is based on a physiological study done using Siberian ferrets.
Zinc phosphide is highly to extremely toxic to both mammals and birds.
All scavengers are at risk of primary poisoning and possibly secondary poisoning from zinc phosphide in meat baits. American Ornithology Union. Supplement to the Auk. 99, No. 3, July 1982. The Audubon Society Encyclopedia of North American Birds.