The ways for birds to fly are multivariate. The ways that are most commonly seen include flying by fluttering their wings and hovering. Common Kestrel often flutters its wings during its flying and it seldom hovers. It often suspend in a certain place by fluttering its wings. Dippers and Alcedo atthis bengalensis will fly straightly along the water surface. The flying routes of wagtail and woodpeckers are like waves. Muscicapidae and Drongo fly into the air to get their foods then fly back to the original place. The route of its flying is an irregular curve. Skylarks can rise and fall vertically; while the rising and landing of an eagle is done through its wheeling in the air. Wren and Timaliinae only fly in short distances. Snipes flutter their wings very quickly when they fly after being shocked and they cry while flying. During the flying of wild ducks, the fluttering of their wings sounds like whistling. Ardeidae birds flutter their wings very slowly and their necks are in the“S”-shape during flying. Geese ducks, stork and cranes stretch their neck straight forward during flying; while hawks and eagles have wide-spread wings and they can keep hovering for quite a long time without fluttering their wings. Rough-legged buzzards often draw back the tips of their wings when flying against winds. Some birds have special flying formations during flying, such as wild geese and cranes, they often form a straight
“line”or a “人”formation. When Charadriidae and Scolopacidae birds fly in groups, their action in rising up, diving and turning are united and clear. For some birds, they even have special flying
“performances” in their mating seasons.
