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- Bird_migration abstract "Bird migration is the regular seasonal movement, often north and south along a flyway between breeding and wintering grounds, undertaken by many species of birds. Migration, which carries high costs in predation and mortality, including from hunting by humans, is driven primarily by availability of food. Migration occurs mainly in the Northern Hemisphere where birds are funnelled on to specific routes by natural barriers such as the Mediterranean Sea or the Caribbean Sea.Historically, migration has been recorded as much as 3,000 years ago by Ancient Greek authors including Homer and Aristotle, and in the Book of Job, for species such as storks, Turtle Doves, and swallows. More recently, Johannes Leche began recording dates of arrivals of spring migrants in Finland in 1749, and scientific studies have used techniques including bird ringing and satellite tracking. Threats to migratory birds have grown with habitat destruction especially of stopover and wintering sites, as well as structures such as power lines and wind farms.The Arctic Tern holds the long-distance migration record for birds, travelling between Arctic breeding grounds and the Antarctic each year. Some species of tubenoses (Procellariiformes) such as albatrosses circle the earth, flying over the southern oceans, while others such as Manx Shearwaters migrate 14,000 km (8,700 mi) between their northern breeding grounds and the southern ocean. Shorter migrations are common, including altitudinal migrations on mountains such as the Andes and Himalayas.The timing of migration is controlled primarily by changes in day length. Migrating birds navigate using celestial cues from the sun and stars, the earth's magnetic field, and probably also mental maps. Migration has developed independently in different groups of birds and does not appear to require genetic change; some birds have acquired migratory behaviour since the last ice age.".
- Bird_migration thumbnail BrantaLeucopsisMigration.jpg?width=300.
- Bird_migration wikiPageExternalLink occurrence-maps.
- Bird_migration wikiPageExternalLink default.cfm.
- Bird_migration wikiPageExternalLink 0926_020927_birdmigration.html.
- Bird_migration wikiPageExternalLink birdmigration.
- Bird_migration wikiPageExternalLink annual-cycle.
- Bird_migration wikiPageExternalLink index.shtml.
- Bird_migration wikiPageExternalLink cmmn.html.
- Bird_migration wikiPageExternalLink www.groms.de.
- Bird_migration wikiPageExternalLink Alerstam_detours_2001.pdf.
- Bird_migration wikiPageExternalLink www.migraction.net.
- Bird_migration wikiPageExternalLink www.migrate.ou.edu.
- Bird_migration wikiPageExternalLink birds.
- Bird_migration wikiPageExternalLink www.olangowildlifesanctuary.org.
- Bird_migration wikiPageExternalLink index.html.
- Bird_migration wikiPageExternalLink birds.
- Bird_migration wikiPageExternalLink ?p=173.
- Bird_migration wikiPageExternalLink Bontadina_FunEco2003.pdf.
- Bird_migration wikiPageExternalLink default.asp?taal=2.
- Bird_migration wikiPageID "201943".
- Bird_migration wikiPageRevisionID "604325539".
- Bird_migration hasPhotoCollection Bird_migration.
- Bird_migration subject Category:Bird_flight.
- Bird_migration subject Category:Ornithological_terminology.
- Bird_migration subject Category:Ornithology.
- Bird_migration type Animal.
- Bird_migration type Eukaryote.
- Bird_migration type Species.
- Bird_migration type Organism.
- Bird_migration comment "Bird migration is the regular seasonal movement, often north and south along a flyway between breeding and wintering grounds, undertaken by many species of birds. Migration, which carries high costs in predation and mortality, including from hunting by humans, is driven primarily by availability of food.".
- Bird_migration label "Bird migration".
- Bird_migration label "Migración de las aves".
- Bird_migration label "Migration des oiseaux".
- Bird_migration label "Migração de aves".
- Bird_migration label "Uccelli migratori".
- Bird_migration label "Vogeltrek".
- Bird_migration label "Vogelzug".
- Bird_migration label "Wędrówki ptaków".
- Bird_migration label "Миграция птиц".
- Bird_migration label "هجرة الطيور".
- Bird_migration label "渡り鳥".
- Bird_migration label "鸟类迁徙".
- Bird_migration sameAs Vogelzug.
- Bird_migration sameAs Migración_de_las_aves.
- Bird_migration sameAs Migration_des_oiseaux.
- Bird_migration sameAs Migrasi_burung.
- Bird_migration sameAs Uccelli_migratori.
- Bird_migration sameAs 渡り鳥.
- Bird_migration sameAs 철새.
- Bird_migration sameAs Vogeltrek.
- Bird_migration sameAs Wędrówki_ptaków.
- Bird_migration sameAs Migração_de_aves.
- Bird_migration sameAs m.01cppc.
- Bird_migration sameAs Q216507.
- Bird_migration sameAs Q216507.
- Bird_migration wasDerivedFrom Bird_migration?oldid=604325539.
- Bird_migration depiction BrantaLeucopsisMigration.jpg.
- Bird_migration isPrimaryTopicOf Bird_migration.
