A Conversation for The Lounge

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Post 1

Paigetheoracle

Why do birds nod their heads when they walk?


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Post 2

Baron Grim

It has to do with the way birds vision works. They bob their heads as they walk to stabilize their image of the world temporarily, otherwise it would all be a blur. Humans and other animals do something similar by twitching our eyes.

http://www.wired.com/2015/01/whats-birds-bob-heads-walk/


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Post 3

Paigetheoracle

Ach so! And I thought it might be something to to do with their anatomy. Well you learn something every day and at my age, forget it by the next morning


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Post 4

ITIWBS

...much the same thing as makes men swing their shoulders and women swing their hips when walking, balance...


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Post 5

Paigetheoracle

I wouldn't know anything about that, I'm totally unbalanced according to my psychiatrist. Actually, no joke, my balance is going - its all these cochlear hairs dropping off inside and my other hair dropping off outside


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Post 6

Baron Grim

It's not for balance, as they tested birds on treadmills inside clear boxes and when they walked while their environment was stable they didn't bob their heads.


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Post 7

Baron Grim

Also see this related video.

http://youtu.be/_dPlkFPowCc


He later attaches a minicam to a chicken's head to see if it would make a good steadicam. smiley - laugh


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Post 8

Paigetheoracle

Extremely interesting but I must dash - visiting the doctors for 3.00 appointment


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Post 9

paulh, not fond of Lord Mudpants

Wynken, Blynken, and Nod one night
Sailed off in a wooden shoe,—
Sailed on a river of crystal light
Into a sea of dew.


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Post 10

Paigetheoracle

Did it work Baron? I was thinking of when the chicken crossed the road, on the way to the slaughterhouse


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Post 11

Paigetheoracle

I thought it was a pea green boot, not a shoe?


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Post 12

Paigetheoracle

Still its probably on the other foot now


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Post 13

paulh, not fond of Lord Mudpants

The peas in my garden are starring in a podcast.


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Post 14

Baron Grim

Did the Chickicam work? Well, sort of.

http://youtu.be/UytSNlHw8J8

But not really. When the chicken holds its head still, you get a still image, but you don't really get much choice about where the camera points and how long it points there.


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Post 15

ITIWBS

Not really a chicken-eye point of view, the chickens eyes point out the sides of its head, hence constant head motion as it watches all around.


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Post 16

paulh, not fond of Lord Mudpants

smiley - online2long

I expect that many fish have a similar problem with seeing.


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