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Old Thursday 11th January 2018, 20:08   #1
alanc
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Gray or Gray-lined Hawk

This guy seen about 15km south of Jaco on the Pacific coast of
Costa Rica over Christmas. Looks very similar to me to the Gray-lined Hawk
but not sure if the location is too far north. The tail pattern is ok for GLH
Any comments?
thanks alan
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Old Thursday 11th January 2018, 21:43   #2
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It is a long way from given range but it does look like Gray-lined to me.


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Old Thursday 11th January 2018, 22:38   #3
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Based on range as Andy mentioned (North of Oso Peninsula) it should be a Gray Hawk (see this ebird article: Gray Hawk or Gray-lined Hawk)

This is a great photo but do you have any photos from side or back of bird that might better show some of the key differences?
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Old Thursday 11th January 2018, 22:45   #4
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You can see some barring on the coverts visible, and the gray bars on the chest appear similar in color to the mantle / upper side of the bird. However these are hard to interpret from one photo from this angle. The tail band is also hard to say anything about conclusively. It certainly looks interesting but I wouldn't hang my hat on it.

Any other photos?
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Old Thursday 11th January 2018, 22:52   #5
alanc
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Hi Dave and Andy
Thankyou both for your comments. I do have other photos but they are very similar to the one posted so won't be of help. I did notice the white areas on the leading edges of the folded wings which appear to be very similar to
Gray lined. I reckon the location was about 80 miles or so north of the Osa peninsular. i know that other s american species are being recorded further north than usual so can range be strictly applied?
alan

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Old Thursday 11th January 2018, 22:58   #6
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I am not certain that the range is really understood at such a fine grain yet, and I don't think the location you describe is so far out of range to be that much of an attention grabber. Raptors fly well, even resident species!
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Old Thursday 11th January 2018, 23:06   #7
alanc
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Thanks PBJosh. Yes - The GL is recorded in Panama (I'm not sure how often) and this location is only around 160 miles N of the border.
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Old Friday 12th January 2018, 00:01   #8
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Send a PM to birdingcraft, he might have more information about the usual range of these. Likewise, peruse these two maps for the publicly available infor for the last 10 years:
http://ebird.org/ebird/map/gryhaw2?n...o=12&yr=last10
http://ebird.org/ebird/map/gryhaw3?n...=2008&eyr=2018

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Old Friday 12th January 2018, 10:38   #9
alanc
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Thanks neils
The exact location of my bird was Estorillo Oeste which is just slightly north of another sighting noted on the ebird map.
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Old Friday 12th January 2018, 11:11   #10
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Quote:
Originally Posted by pbjosh View Post
You can see some barring on the coverts visible, and the gray bars on the chest appear similar in color to the mantle / upper side of the bird. However these are hard to interpret from one photo from this angle. The tail band is also hard to say anything about conclusively. It certainly looks interesting but I wouldn't hang my hat on it.

Any other photos?
Looks spot on for GlH to me, probably another bar being hidden by the wire and certainly doesn't fit grey Hawk.



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Old Friday 12th January 2018, 23:12   #11
alanc
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thanks Andy- I think for the moment I'll have to file it as a probable GLH
cheers
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Old Saturday 13th January 2018, 11:56   #12
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Quote:
Originally Posted by alanc View Post
thanks Andy- I think for the moment I'll have to file it as a probable GLH
cheers
alan

I know what I'd do if it were mine, not as if it's a poor or distant shot....



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