North American Chimney Swift Nest Site Research Project: Chimney Swifts, as their name indicates, tend to nest and roost in chimneys. Unfortunately, when they do this, their young tend to make a lot of noise, and many homeowners have the birds forcibly removed. Obviously, this reduces the swift populations, which is unfortunate, as these migratory birds eat a third of their body weight in pests (like mosquitoes, termites, and biting flies) every single day. Researchers want you to find a way to allow swifts in your chimney (either by closing the damper or adding more insulation to reduce the noise) or building a substitute nesting tower. For plans and more information, check out ChimneySwifts.org.