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FORUMS Photo Sharing & Visual Enjoyment Birds 
Thread started 30 Dec 2015 (Wednesday) 12:24
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markesc
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Aug 25, 2017 15:02 |  #10756

PCousins wrote in post #18436659 (external link)
The peregrine falcon is the fastest bird, and the fastest member of the animal kingdom. When in its hunting dive, the stoop, it soars to a great height, then dives steeply at speeds of over 200 mph.

There is a pair less than a few minutes drive from my house in a quarry, but whenever I see them they are always so high up. This was a lucky shot where it came down to a reasonable height.


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Someone told me they are one of the few birds that can break terminal velocity... not sure if that's true or not, but I've seen 'em in the dive routine, it's pretty crazy!




  
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PCousins
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Aug 25, 2017 15:20 |  #10757

markesc wrote in post #18436846 (external link)
Someone told me they are one of the few birds that can break terminal velocity... not sure if that's true or not, but I've seen 'em in the dive routine, it's pretty crazy!

Yes I often watch the dive routine and try to get a photo but being in a quarry the light is so very poor and I struggle to get a decent photo with them just flying. It's a real challenge. I often see them bringing in pigeon's hoping they will go to a ledge not to high up but they seem to have their favourite spots where they are partially concealed.


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TustinMike
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Aug 25, 2017 15:39 |  #10758

markesc wrote in post #18436846 (external link)
Someone told me they are one of the few birds that can break terminal velocity... not sure if that's true or not, but I've seen 'em in the dive routine, it's pretty crazy!


Not to be too much of a geek (though, I guess I am one by replying this way :-)) but by definition, that's not possible. The statement is internally inconsistent (see the definition, below).

Terminal velocity

Terminal velocity is the highest velocity attainable by an object as it falls through air. It occurs once the sum of the drag force (Fd) and buoyancy equals the downward force of gravity (FG) acting on the object. Since the net force on the object is zero, the object has zero acceleration.


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Chris ­ L ­ F
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Aug 25, 2017 16:22 |  #10759

I think they are about ready to leave the nest!

IMAGE: https://farm5.staticflickr.com/4439/36632224302_f3f1b4e7ff_b.jpg
IMAGE LINK: https://flic.kr/p/XP4J​3b  (external link) IMG_0087-2 (external link) by Hinkleigh (external link), on Flickr

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CyberDyneSystems
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Aug 25, 2017 16:23 |  #10760

PCousins wrote in post #18436858 (external link)
Yes I often watch the dive routine and try to get a photo but being in a quarry the light is so very poor and I struggle to get a decent photo with them just flying. It's a real challenge. I often see them bringing in pigeon's hoping they will go to a ledge not to high up but they seem to have their favourite spots where they are partially concealed.


I spent a good deal of time trying to get good flight shots of an African falcon species (can't recall the name) a few weeks back. Not easy!


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CyberDyneSystems
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Aug 25, 2017 16:26 as a reply to  @ TustinMike's post |  #10761

Clearly the Peregrine simply has the highest terminal velocity of anything alive on the planet.


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Sibil
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Aug 25, 2017 18:01 |  #10762

IMAGE: http://i.imgur.com/ojmuytp.jpg



  
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Peter2516
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Aug 25, 2017 18:21 |  #10763


Wow. Beautiful image.


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Aug 25, 2017 18:23 |  #10764

CyberDyneSystems wrote in post #18435555 (external link)
A Bateleur from Botswana having a drink.



Awesome click Jake.


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Aug 25, 2017 18:27 |  #10765

shooz wrote in post #18436499 (external link)
QUOTED IMAGE

Great-horned owlet


Very cool. I am going back tomorrow where I saw GHO I hope they are still around where I saw them. Last year I watch GHO for the entire summer enjoying to phtograph them every other day last year but this year I have been busy specially Aug but early July I saw them every other day.


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Peter2516
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Aug 25, 2017 18:28 as a reply to  @ post 18436659 |  #10766

Great shot.


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Archibald
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Aug 25, 2017 19:53 |  #10767

TustinMike wrote in post #18436874 (external link)
Not to be too much of a geek (though, I guess I am one by replying this way :-)) but by definition, that's not possible. The statement is internally inconsistent (see the definition, below).

Terminal velocity

Terminal velocity is the highest velocity attainable by an object as it falls through air. It occurs once the sum of the drag force (Fd) and buoyancy equals the downward force of gravity (FG) acting on the object. Since the net force on the object is zero, the object has zero acceleration.

Any downward force in addition to gravity will result in a speed greater than terminal velocity.


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Peter2516
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Aug 25, 2017 20:27 |  #10768


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Peter2516
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Aug 25, 2017 20:30 |  #10769


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Pondrader
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Aug 25, 2017 21:26 |  #10770

Someone's really into his hair..


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Jeff ........7D Mark II, 7D, 70-300L, 100-400LII
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