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Old Saturday 11th November 2017, 02:02   #1
vpr
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Hawk, Southern Vancouver Island

Juvenile hawk on southern Vancouver Island.

Not sure if it is a sharp-shinned hawk or a Cooper's or something else.

I picked two photos that together show the shape, tail-feathers and under-wings.

It's quite small, about the size of a merlin (which I thought it was at first).
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Last edited by vpr : Saturday 11th November 2017 at 02:32. Reason: Typo
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Old Saturday 11th November 2017, 02:10   #2
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Looking at its legs, I'm going with Sharpie.
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Old Saturday 11th November 2017, 02:30   #3
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sharpie for me as well.

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Old Saturday 11th November 2017, 02:32   #4
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One more for Sharp-Shinned.
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Old Saturday 11th November 2017, 02:33   #5
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Thanks a lot for the quick replies!

What aspect of the legs gives it away?
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Old Saturday 11th November 2017, 06:23   #6
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Originally Posted by vpr View Post
Thanks a lot for the quick replies!

What aspect of the legs gives it away?
They're very thin. In a Cooper's Hawk, they'd be more robust, and in a Goshawk, they'd look really powerful. Also, AFAIK a Sharpie (being a bird specialist) has proportionally longer toes (or at leas a longer middle toe) than the other two.
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Old Saturday 11th November 2017, 10:11   #7
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What aspect of the legs gives it away?
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Originally Posted by Sangahyando View Post
They're very thin.
That's why it's called Sharp-shinned
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Old Saturday 11th November 2017, 20:54   #8
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Thanks a lot everyone. Very helpful.

The more I stare at the difference in various photos the more I can see it too. The more roundish head (maybe not obvious in the two photos I attached) also points to a sharp-shinned.

I don't think I'd be able to tell them apart in the field just yet.
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Old Saturday 11th November 2017, 20:56   #9
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Keep practicing and put some trust in your judgement!
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Old Saturday 11th November 2017, 21:47   #10
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Thanks a lot everyone. Very helpful.

The more I stare at the difference in various photos the more I can see it too. The more roundish head (maybe not obvious in the two photos I attached) also points to a sharp-shinned.

I don't think I'd be able to tell them apart in the field just yet.
Hi vpr,

It isn't as hard as you think telling them apart when you see them alive. It is more difficult telling them apart in photos. Cooper's Hawks are really quite a bit larger all around than Sharpshins are.

Read this chart from the Canadian Peregrine Foundation which gives their relative weights and measurement by sex. Notice how much more Cooper's weigh than Sharpshins do. They are a much bulkier bird. The male Sharpshin can be quite small; Blue Jay size.

http://www.peregrine-foundation.ca/r...rpshinned.html

You can find numerous pictures of both species, along with other Raptors, in this excellent website.

Bob

Last edited by ceasar : Saturday 11th November 2017 at 21:50.
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Old Sunday 12th November 2017, 00:37   #11
vpr
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Thanks for the link! It's very interesting and helpful.

You're right about the size - it was very small. At first glance in the field I thought it was a merlin (until I got a closer look).
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Old Sunday 12th November 2017, 02:48   #12
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For a juvenile, the pattern of the underside is also quite different

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