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Migration along orthodromic sun compass routes by Arctic birds
Responsible organisation
2001 (English)In: Science, Vol. 291, 300-303 p.Article in journal (Refereed) Published
Abstract [en]

Flight directions of birds migrating at high geographic and magnetic latitudes can be used to test bird orientation by celestial or geomagnetic compass systems under polar conditions. Migration patterns ofarctic shorebirds, revealed by tracking radar studies during an icebreaker expedition along the Northwest Passage in 1999, support predicted sun compass trajectories but cannot be reconciled with orientation along either geographic or magnetic loxodromes (rhumb Lines). Sun compass routes are similar to orthodromes (great circle routes) at high latitudes, showing changing geographic courses as the birds traverse longitudes and their internal clock gets out of phase with Local time. These routesbring the shorebirds from high arctic Canada to the east coast of North America, from which they make transoceanic flights to South America. The observations are also consistent with a migration Link between Siberia and the Beaufort Sea region by way of sun compass routes across the Arctic Ocean.

Place, publisher, year, edition, pages
2001. Vol. 291, 300-303 p.
Keyword [en]
bird migration, migratory birds, Tundra Northwest 1999, SWEDARCTIC 1999, Arctic, Arctic Ocean
Research subject
SWEDARCTIC 1999, Tundra nordväst 1999
Identifiers
URN: urn:nbn:se:polar:diva-35OAI: oai:DiVA.org:polar-35DiVA: diva2:568165
Note

Source: Polardok by Swedish Polar Research Secretariat

Available from: 2012-11-15 Created: 2012-11-15 Last updated: 2015-09-30

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