Whiffling
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Whiffling is a term used in ornithology to describe the behavior whereby a bird rapidly descends with a zig-zagging, side-slipping motion. Sometimes to whiffle, a bird flies briefly with its body turned upside down but with its neck and head twisted 180 degrees around in a normal position. The aerodynamics which usually give a bird lift during flying are thereby inverted and the bird briefly plummets toward the ground before this is quickly reversed and the bird adopts a normal flying orientation.[1][2] This erratic motion resembles a falling leaf, and is used to avoid avian predators or may be used by geese (family Anatidae) to avoid a long, slow descent over an area where wildfowling is practised.[3]
The behavior is seen in several species including lesser yellowlegs (Tringa flavipes), the black-tailed godwit (Limosa limosa), the northern lapwing (Vanellus vanellus), geese (e.g., pink-footed goose (Anser brachyrhynchus)), three species of scoter (Melanitta), and other members of the family Anatidae.[4]
References
- ^ Ogilvie, M.A.; Wallace, D.I.M. (1975). "Field identification of grey geese" (PDF). British Birds. 68: 57–67.
- ^ Ceurstemont, S. (25 January 2012). "Goose flying upside down captured in slow-mo movie". New Scientist TV. Retrieved 19 April 2017.
- ^ Weaver, Pete (1981). "Whiffling". The Birdwatcher's Dictionary. Calton [GB]: T. & A.D. Poyser. ISBN 0-85661-028-3.
- ^ Humphries, D. A.; Driver, P. M. (1970). "Protean defence by prey animals". Oecologia. 5 (4): 285–302. Bibcode:1970Oecol...5..285H. doi:10.1007/BF00815496. PMID 28309783. S2CID 20642468.
External links
- Goose flies upside-down
- Whiffling geese: photographs and comments on reasons
- Slow-motion video of whiffling geese
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