As their name implies (Apodiform = "unfooted"), swifts and hummingbirds are exceptional flyers. They have light bodies, long wings (thanks to a long hand bone), and tiny feet that work for perching, but not walking. Their tapering wings beat rapidly for fast, agile flight. Swifts stay aloft for extraordinary periods of time, generally spending the whole day flying, perching only at night. Hummingbirds look like bees because of their unique ability (amongst birds) to hover, their wings making a buzzing sound as they beat up to 80 times per second. They fly forward and backward, rotating the outer (hand) part of their wings to maneuver. Hummingbirds hover while feeding on plant nectar that fuels their high-energy flight. Both swifts and hummingbirds catch insects on the wing by opening their mouths wide while flying. Some swifts and hummingbirds make migrations of hundreds of miles to warmer areas during the winter.