Beaphar Anti-Parasite Spot-on for Large Birds is suitable for Parrots and other large birds. Anti-Parasite Spot-on contains ivermectin and is effective against roundworms, feather lice, red (blood) mites, feather mites, air sac mites and mange mites (scaly face) for up to 4 weeks after treatment. This pack is suitable for birds weighing between 300-750g.