Insecticides and pesticides kill or repel a wide range of insects and pests. They're employed to keep insects and vermin out of commercial, residential, and industrial structures both inside and out. Insecticides (spray or granular), traps, and repellants are used to get rid of flying and crawling bugs. Chemical-free insect management is provided via flyswatters, electronic insect killers, and pest repellers. Bait is used in traps and bait stations to catch rats, mice, snakes, and other pests. Pigeons and other birds are deterred from perching and nesting on awnings, rafters, and other outdoor places with bird-repellant spikes, gel, and visual deterrents.