Just about every house is equipped with rain gutters. Often the gutter system includes some form of gutter protection system. It means gutter guards, gutter covers, gutter screens, or gutter filters that prevent leaves, pine needles, twigs, tree flowers, seeds, seed pods, and other debris from getting into the gutters. If you have debris in the gutter, it can form a little dam inside the rain gutter. Mosquitoes bite birds and get infected.