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Why Do Owls Bob Their Heads?

To determine what’s what and what’s where . . .
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Great Gray Owl
© Jim Richmond - FCC

If you were to stand face to face with an owl, including this Great Gray Owl, it would eventually move its head, bobbing rhythmically from side to side, then forward, then back. Or almost completely upside down. This head-bobbing action helps make up for an anatomical limitation: an owl’s eyes are fixed in position — they can’t move the way a human’s eyes do. The owl’s varied head movements help it judge the position and distance of things around it — essentially, to triangulate on objects, including potential prey. And to build a composite picture of its surroundings.

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BirdNote®

Why Do Owls Bob Their Heads?

Written by Bob Sundstrom

This is BirdNote.

[Great Gray Owl hooting, http://macaulaylibrary.org/audio/4543, 0.06-.09]

If you were to stand face to face with an owl, after a while it would start to move its head, bobbing rhythmically from side to side, then forward, then back. Or almost completely upside down. All while still looking at you, with its body still facing the front. 

Is the owl trying to communicate something? Is this, perhaps, some kind of dance?  

All these varied head movements help the owl judge the position and distance of things around it — essentially, to triangulate on objects, including potential prey. And to build a composite picture of its surroundings. This head-bobbing helps make up for an anatomical limitation: an owl’s eyes are fixed in position — they simply can’t move the way our eyes do. So to look up, down, or to the side, an owl has to move its head. They have very flexible necks and can do ¾ of a full head turn, looking over one shoulder, around the back, and almost over the opposite shoulder. And after a few of these head-bobs to triangulate on their prey, they rarely miss.

It’s not only owls that measure the world this way. Most other birds of prey, like falcons and hawks, have the same intent, fixed, predator’s eyes, and so they, too, perform their share of head-bobs, figuring out what’s what and what’s where. (Great Gray Owl [49944])

For BirdNote, I’m Mary McCann.

###

Bird sounds provided by The Macaulay Library of Natural Sounds at the Cornell Lab of Ornithology, Ithaca, New York. Great Gray Owl [4543] recorded by Sture Palmer; [49944] recorded by L J Peyton; ambient sound from Great Gray Owl [48910] recorded by D S Herr.
BirdNote’s theme music was composed and played by Nancy Rumbel and John Kessler.
Producer: John Kessler
Executive Producer: Dominic Black
© 2016 Tune In to Nature.org   January 2018/2021   Narrator: Mary McCann

ID#     owl-07-2016-01-11owl-07       

Bob Sundstrom
Writer
Mary McCann
Narrator
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Tagsbehavior raptor owl

Related Resources

Great Gray Owl – More at Audubon’s Guide to North American BirdsLearn more about raptor biology at the Peregrine Fund

More About These Birds

Great Gray Owl (Strix nebulosa)

Strix nebulosa

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