Ganso de testa branca: Diferenzas entre revisións
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Liña 78:
* [http://www.birds.cornell.edu/AllAboutBirds/BirdGuide/Greater_White-fronted_Goose.html White-fronted Goose] - Cornell Lab of Ornithology
* [http://www.sdakotabirds.com/species/greater_white_fronted_goose_info.htm White-fronted Goose Información e fotos] - South Dakota Birds and Birding
* [https://web.archive.org/web/20080312033804/http://www.mbr-pwrc.usgs.gov/id/framlst/i1710id.html White-fronted Goose] - USGS Patuxent Bird Identification InfoCenter
* [http://ibc.hbw.com/ibc/phtml/especie.phtml?idEspecie=423 Videos] na Internet Bird Collection
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