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Birds Use Light, Not Magnetic Field, to Migrate

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	Birds Use Light, Not Magnetic Field, to Migrate by MM-9 :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message fyi.... http://www.wired.com/wiredscience/2009/10/bird-migration-light/ Oscar Canino San Francisco, CA oscarboy@... BirdChat Guidelines: http://www.ksu.edu/audubon/chatguidelines.html Archives: http://listserv.arizona.edu/archives/birdchat.html
	Re: Birds Use Light, Not Magnetic Field, to Migrate by Rick-124 :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message MM wrote: > fyi.... > > http://www.wired.com/wiredscience/2009/10/bird-migration-light/ > > Oscar Canino > San Francisco, CA > oscarboy@... > > BirdChat Guidelines: http://www.ksu.edu/audubon/chatguidelines.html > Archives: http://listserv.arizona.edu/archives/birdchat.html > > It appears to me that the thrust of the article is that birds sense magnetic fields with cells in the eye and not in the beak.It has been known for a long time that magnetic fields influence the direction birds must use to get to their wintering grounds. -- Rick Fargo, ND N 46°53'251" W 096°48'279" Remember the USS Liberty http://www.ussliberty.org/ BirdChat Guidelines: http://www.ksu.edu/audubon/chatguidelines.html Archives: http://listserv.arizona.edu/archives/birdchat.html
	Re: Birds Use Light, Not Magnetic Field, to Migrate by Bob Powell-2 :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message This is a dreadful example of poor headline writing. The referenced paper does not overturn decades-old experiments demonstrating the ability of some birds to orient themselves using the Earth's magnetic field. Instead, it confounds one theory about how this occurs. The paper showed that the trigeminal nerve connecting iron deposits in the beaks of European Robins to the brain is not part of the mechanism. Orientation and navigation in migrant birds remains a rich field of inquiry. Birders who are interested in the topic will probably enjoy the lead article in the latest issue of "The Auk," which surveys the state of current thinking: Wiltschko, R and W Wiltschko. 2009. Avian Navigation. The Auk 126:717-7434. Cheers, Bob On Thu, Oct 29, 2009 at 10:30 AM, MM <oscarboy@...> wrote: > fyi.... > > http://www.wired.com/wiredscience/2009/10/bird-migration-light/ > > Oscar Canino > San Francisco, CA > oscarboy@... > > BirdChat Guidelines: http://www.ksu.edu/audubon/chatguidelines.html > Archives: http://listserv.arizona.edu/archives/birdchat.html > -- Robert D Powell Congress Farm Research Institute Wilmington, OH, USA rdp1710@... http://rdp1710.wordpress.com Nulla dies sine aves BirdChat Guidelines: http://www.ksu.edu/audubon/chatguidelines.html Archives: http://listserv.arizona.edu/archives/birdchat.html