>>41
Cows: Farm animals, innumerable population density.
Pigs: Farm animals, innumerable population density.
Sheep: Farm animals, innumerable population density.
Mosquitos: Parasites, innumerable population density.
The solutions are pretty obvious, although I would much rather farm them than have them try to suck my stomach acids out through a proboscis the size of a reservior pump whenever I go swimming.