Chemical control of vampire bats = Combate quimico de los murcielagos vampiros

Both methods are based on an anticoagulant, diphenadione. The chemical is either injected into the rumen of cattle or applied directly to the back of vampire bats captured near livestock. The blood of treated cattle is poisonous to vampire bats for about three nights following treatment. Vampire bats with the anticoagulant applied to their backs return to their roost where the chemical is passed from one to several others by contact and mutual grooming. One treated vampire bat can carry sufficient chemical to poison 20 other vampire bats.