Drift migration

Drift migration

Drift migration is the phenomenon in which migrating birds are blown off course by the winds at the time they are in flight. It is more likely to happen to birds heading south in autumn because the large numbers of inexperienced young birds are less able to compensate than the adults heading north in spring.{http://rspb.royalsocietypublishing.org/content/270/Suppl_1/S8}

Drift is assisted by disorientating conditions such as mist or drizzle, and can result in large numbers of birds arriving together in an area in which they are not normally seen. In the UK this is called a fall, while in the U.S. it's known as a fallout, though in the latter case, it need not involve vagrant birds.

An example would be an east wind in September blowing Scandinavian migrants such as Bluethroats, Wrynecks, and the continental race of Robin onto the east coast of England and Scotland, leading to temporary concentrations of these species at headlands like Spurn.

See also


Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • Migration — Migration, Migratory behavior, or Migratory may refer Gene migration, a process in evolution and population genetics Animal migration, the travelling of long distances in search of a new habitat Human migration, physical movement by humans from… …   Wikipedia

  • Migration Des Insectes — Des monarques migrant par milliers vers le site d Angangueo dans le nord du Michoacán au Mexique. Des milliards d insectes migrent chaque année, certains sur de petites distances, d autres sur des distances intercontinentales, comparables à… …   Wikipédia en Français

  • migration — migrational, adj. /muy gray sheuhn/, n. 1. the process or act of migrating. 2. a migratory movement: preparations for the migration. 3. a number or body of persons or animals migrating together. 4. Chem. a movement or change of position of atoms… …   Universalium

  • Migration (Astronomie) — Der Begriff planetare Migration bezeichnet die Bahnänderung eines Planeten während der Entstehung eines Planetensystems um einen Zentralstern. Da es sich um ein theoretisches Modell handelt, gibt es allerdings keine einheitliche Definition.… …   Deutsch Wikipedia

  • Migration des insectes — Des monarques migrant par milliers vers le site d Angangueo dans le nord du Michoacán au Mexique. Des milliards d insectes migrent chaque année, certains sur de petites distances, d autres sur des distances intercontinentales, comparables à… …   Wikipédia en Français

  • Drift fence — For the 1936 film, see Drift Fence. Drift fences were used in the Texas Panhandle from 1882 to 1887 to control cattle drift the winter migration of livestock to warmer territory. Long sections of barbed wire fence were built by ranchers to keep… …   Wikipedia

  • Migration (Genetik) — Als Migration bezeichnet die Populationsgenetik die Ein und Abwanderung von Individuen zwischen verschiedenen Populationen einer Art. Dadurch findet ein Austausch zwischen den einzelnen Genpools der Populationen statt (Genfluss). Ist die… …   Deutsch Wikipedia

  • Bird migration — A flock of Barnacle Geese during autumn migration …   Wikipedia

  • Reverse migration — is a phenomenon in bird migration. Although some large birds such as swans learn migration routes from their parents, in most small species, such as passerines, the route is genetically programmed, and young birds can innately navigate to their… …   Wikipedia

  • Fish migration — Many species of salmon are anadromous and migrate long distances up rivers and streams to spawn. Many types of fish migrate on a regular basis, on time scales ranging from daily to annually or longer, and over distances ranging from a few metres… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”