Author Topic: Whiffling geese ... if you have good eyes ...☺  (Read 2427 times)

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Offline Clive

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Whiffling geese ... if you have good eyes ...☺
« on: November 09, 2012, 04:12:08 AM »
Warning: This is no National geographic video. ;)

I suspect that many don't quite get this "whiffling" behaviour presented here. ...and you still may not after viewing my poor video below. ;)

See here for still photos and a description of whiffling. BTW ... quite a few folks here watch birds and ducks do this as well...they fly so damn fast though. Ill never photograph that. ;) 

At about 13 seconds in the video watch the goose in the upper left corner.  It will flip upside down and drop fast. Don't blink as you will miss it. Then right after that, two geese to the right of the first whiffler will do the same. It is fast.

Again, watch again that first bird at 13 seconds. See how fast it falls. But it is still in amid the flock so one wonders why they do this. Interesting that the first bird to do this ends up near the front of the pack. 

BTW...Nothing else happens after 25 seconds in the video. ☺

Brief description of what you are seeing (from my web page):
Ducks and geese will dropping into a pond by twisting and turning as they come down. This is called whiffling. When I first noticed whiffling, I assumed they were merely twisting sideways to lose "lift" and allow them to drop faster. I was surprised when I took some pictures a few years ago and saw that one or two birds were completely upside down. Interestingly, their heads were upright. When they slip sideways, they indeed lose lift, but when they turn upside down, there is actually a downward pull (Bernoulli in reverse) and they drop fast for a fraction of a second.


Clive

[youtube]http://www.youtube.com/watch?v=P2SmB9BEj7E[/youtube]
« Last Edit: November 09, 2012, 05:24:34 AM by Clive »
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Offline nezih

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Re: Whiffling geese ... if you have good eyes ...☺
« Reply #1 on: November 09, 2012, 06:24:05 AM »
Great. I think it can compete with National Geographic videos.
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Offline wildieswife

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Re: Whiffling geese ... if you have good eyes ...☺
« Reply #2 on: November 09, 2012, 12:30:39 PM »
Interesting - I'll have to watch out to see if your Canadian interlopers do it too - I suspect they do.

The expand to full screen is better for this one.

Pat
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Offline Hans de Koning

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Re: Whiffling geese ... if you have good eyes ...☺
« Reply #3 on: November 15, 2012, 09:49:41 AM »
Hi Clive,
Nice video!
You've already seen the slomo video
[youtube]http://www.youtube.com/watch?v=Tyzl4mDM5GM[/youtube]
I shot last year, but this year we filmed whiffling Greylag Geese more close, see: http://vimeo.com/52341822.

(And for you all photographers out there: yes, we know there's some dirt on the sensor, but trying to clean the sensor outdoors in the wind without proper tools is bound too fail with the risk of damaging the sensor. Shooting with dirt is better than no footage at all. We cleaned the sensor later.)

Offline Clive

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Re: Whiffling geese ... if you have good eyes ...☺
« Reply #4 on: November 15, 2012, 03:08:31 PM »
Hans

Thanks for posting this. Yes, I have seen it before. Excellent stuff...love the slow motion. Thanks.

One thing I noticed in your slow mo videos is that some of the birds seem to rise up perhaps one metre before flipping over..and then drop.

In my (poor) video, the bird in the upper left (that turns upside down) drops fast and then speeds up and ends up near the front and I was wondering if (in some cases) the fast drop in elevation also helps "slingshot" the birds ahead.

Thanks again. I doubt if I'll see this again this fall. Our ponds are frozen over now, although there are still geese around and I hope to get out this afternoon.

Regards,

Clive   
« Last Edit: November 15, 2012, 04:49:06 PM by Clive »
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Offline rannari

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Whiffling geese ... if you have good eyes ...☺
« Reply #5 on: November 16, 2012, 05:16:36 PM »
Nice work Clive! Very interesting behaviour. Thanks.

kurt
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