[wisb] Re: Hawk in Glendale ( coopers or gos )
- From: Ryan Brady <ryanbrady10@xxxxxxxxxxx>
- To: <wisbirdn@xxxxxxxxxxxxx>
- Date: Wed, 16 Sep 2009 15:48:22 -0600
As Brian said, the supercilium is variable among accipiters and in my opinion
is an extremely overrated field mark. It can be used in combination with other
features but honestly it ranks way down the list of things to look at for
separation of these species.
As others have noted, this bird is a juvenile Cooper's Hawk.
Ryan Brady
Washburn, Bayfield County, WI
http://www.pbase.com/rbrady
----------------------------------------
> Date: Wed, 16 Sep 2009 16:18:22 -0500
> Subject: [wisb] Re: Hawk in Glendale ( coopers or gos )
> From: rawshooter@xxxxxxxxx
> To: wisbirdn@xxxxxxxxxxxxx
>
> Hi John,
> I was one that disagreed with the Goshawk ID. The reason is I have photos
> of an immature Cooper's from my back yard with what appears to be a fairly
> distinct off white supercillium. I am very sure it came from a nest of
> Cooper's that was just a couple blocks away and I had seen the young on many
> occasions. Also if you do a google image search for immature cooper's you
> will see many many photos of them with what appears to be a off white -
> light tan line above the eye and extending back. I am far far from an
> expert but have learned over time that it is impossible for Sibleys or any
> other book to capture all plumages etc... in their drawings and photos
> especially when it comes to immature birds or birds that have big
> differences in breeding to non breeding plumage. I tend to rely more on the
> photos I dig up from reliable sources on the web as long as there is more
> than just one example.
>
> Also while searching you find many discussions about the supercillium of
> both species. Some saying bright white to pale on the Goshawk and others
> mentioning pale on the immature Cooper's
>
> http://www.mbr-pwrc.usgs.gov/Infocenter/i3330id.html
>
> The supercillium in Paul's photos looks pale to me or tan although somewhat
> distinct. I would like to know what the records say about Goshawk sightings
> in southeast Wisconsin. I have read up on them somewhat and thought they
> were not migratory and only really move south when the food supply is bad
> ie; during irruptions and mainly in the winter or late winter/early spring.
>
> Brian Hansen
> Milwaukee
>
>
>
> On Wed, Sep 16, 2009 at 3:08 PM, john romano wrote:
>
>> I am not the one person who responded to Paul with a Goshawk ID. However
>> the photos show an obvious white eyeline on the raptor. Both the Sibley and
>> the Peterson guides make a note of the supercillium as an identifying mark
>> for a junvenile Goshawk and not for the Coopers Hawk.
>>
>> So I am wondering why this raptor would not be a Goshawk junenile instead
>> of a Coopers Hawk.
>>
>> John Romano
>> Madison Wi
>>
>>
>> --- On Tue, 9/15/09, Paul Sparks wrote:
>>
>>
>> From: Paul Sparks
>> Subject: [wisb] Re: Hawk in Glendale
>> To: "Wisconsin Bird Net"
>> Date: Tuesday, September 15, 2009, 5:21 PM
>>
>>
>> Just an update for everyone. Most people think the bird is a female
>> Cooper's
>> Hawk. I did get one person that thought it was a Northern Goshawk, and that
>> was in the back of my mind and if I'm honest that's what I had hoped it
>> was.
>> No matter what the bird is, I was glad I saw it and hope it comes back for
>> better photos.
>> Paul Sparks
>> Glendale, Milwaukee County
>>
>> On Tue, Sep 15, 2009 at 3:32 PM, Paul Sparks
>> wrote:
>>
>>> This morning I walked out into my backyard with my camera to see if there
>>> were any good birds back there. Yesterday I had seen a couple warblers of
>>> undetermined species and a Northern Waterthrush feeding in the grass.
>>> Immediately I saw a good sized hawk sitting on the bridge that crosses
>> the
>>> creek, which comes off the Milwaukee river near Kletsch Park. I thought
>> it
>>> was a Red-tailed Hawk because of the size, but after looking at the
>> photos,
>>> I’m pretty sure that isn’t the case. Here are 3 photos showing different
>>> parts of the bird. The bird was sitting in the shade with a very bright
>>> background, so the photos aren’t that great but you should be able to get
>>> the idea. I’d say Cooper’s Hawk, but it seemed really big. I’d love some
>>> feedback on this on what the ID is on this guy.
>>> Here's a link to the photos with the same description as above;
>>> http://photogsparks.wordpress.com/
>>>
>>> Paul Sparks
>>> Glendale, Milwaukee County
>>>
>>>
>>>
>>>
>>
>>
>> --
>> www.paulcsparks.com
>>
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>>
>>
>>
>>
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>
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