Small Birds' Vision: Not So Sharp but Superfast

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Rixter Guru Join Date: Apr 2010 Location: About 4000 miles from the center of the earth (+/-100 mi) Posts: 9910 Good Answers: 1141	Small Birds' Vision: Not So Sharp but Superfast 03/30/2016 10:56 PM
	"One may expect a creature that darts around its habitat to be capable of perceiving rapid changes as well. Yet birds are famed more for their good visual acuity. Joint research by Uppsala University, Stockholm University and the Swedish University of Agricultural Sciences (SLU) now shows that, in small passerines (perching birds) in the wild, vision is considerably faster than in any other vertebrates -- and more than twice as fast as ours." Continue reading...
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Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#1 Re: Small birds' vision: Not so sharp but superfast 03/30/2016 11:12 PM
	Resolving power depends on lens/reflector/aperture diameters, in which small birds would have limited advantage. But small eyes can rotate rapidly, giving them a compensating advantage in detecting motion or change. __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
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SolarEagle Guru Join Date: Mar 2007 Location: by the beach in Florida Posts: 33392 Good Answers: 1817	#2 Re: Small birds' vision: Not so sharp but superfast 03/31/2016 12:27 AM
	__________________ All living things seek to control their own destiny....this is the purpose of life
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Phys Guru Join Date: Feb 2006 Location: middle of nowhere, Pennsylvania Posts: 2603 Good Answers: 63	#5 In reply to #2 Re: Small birds' vision: Not so sharp but superfast 03/31/2016 8:25 AM
	I believe the title began with the words "Small bird's vision" SMALL BIRDS - definitely not the description of a raptor. __________________ Remember when reading my post: (-1)^½ m (2)^½
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SolarEagle Guru Join Date: Mar 2007 Location: by the beach in Florida Posts: 33392 Good Answers: 1817	#6 In reply to #5 Re: Small birds' vision: Not so sharp but superfast 03/31/2016 11:12 AM
	Doubt my vision and I shall make a small quick meal of you.... __________________ All living things seek to control their own destiny....this is the purpose of life
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tcmtech Guru Join Date: Jun 2009 Location: South of Minot North Dakota Posts: 8376 Good Answers: 775	#7 In reply to #6 Re: Small birds' vision: Not so sharp but superfast 03/31/2016 12:13 PM
	Bring it on.
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#3 Re: Small birds' vision: Not so sharp but superfast 03/31/2016 2:47 AM
	Because of the smaller head, and the shorter distance between the eye and the brain, one doesn't get the transmission delays that one might expect with a larger head. With a smaller brain, the processing time in response to stimuli is also shorter. And with a smaller body, the transmission delay on the motor side is also much less. It isn't surprising that they are difficult to catch. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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ozzb Guru Join Date: Mar 2007 Location: Rosedale, Maryland USA Posts: 5197 Good Answers: 266	#4 Re: Small Birds' Vision: Not So Sharp but Superfast 03/31/2016 7:57 AM
	Most birds body temperature is around 105°F. Neurons transfer speed increase with temperature. So faster sample rates. __________________ Life is not a journey to the grave with the intention of arriving in a pretty, pristine body but rather to come sliding in sideways, all used up and exclaiming, "Wow, what a ride!"
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ozzb (1); Phys (1); PWSlack (1); SolarEagle (2); tcmtech (1); Tornado (1)

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