With warmer weather, many of us are moving outdoors to turn our backyards into extended living spaces for our homes. It's tempting to install bug zappers, those electric bug lights that kill mosquitoes at night. While they are effective at killing bloodthirsty mosquitoes, they also attract thousands of harmless insects, too. These insects are food for animals like birds, bats and even aquatic wildlife, and they help keep the biodiversity of the forest intact. Since bug zappers don't know the difference between beneficial insects and pests, they can do more harm than good. To keep mosquitoes at bay, simply bring fans outdoors. The breeze will be enough to keep them away.