21.   EBay, for one, looks like a natural predator.

22.   Federal researchers are searching the wilds of South America for natural predators and methods to control the pests.

23.   Farmers are encouraged to fight insects with natural predators, bug-resistant crops and other environmentally safe techniques.

24.   Funded by a state grant, these six-foot-high structures provide a safe haven of crevasses for fish to hide from natural predators.

25.   I would try to fight aphids by releasing ladybugs, a natural predator, and to battle the casebearers with trichogramma wasps or green lacewings.

26.   If not that, crushing the bugs may release an odor that attracts natural predators.

27.   It has no natural predators in the US.

28.   It no doubt originated somewhere other than Africa and in that original habitat, there must be some natural predator or parasite that kept its population depressed into obscurity.

29.   It has no natural predators.

30.   Koalas flourished in the new habitat free from any natural predator.