[obol] Re: Hawk flight style questions
- From: Owen Schmidt <oschmidt@xxxxxxx>
- To: OBOL Birders Online <obol@xxxxxxxxxxxxx>
- Date: Sat, 17 May 2014 08:48:45 -0700
>> it also soared flat or reverse-dihedraled (is there an official name for
>> this?)
Anhedral. Also called reverse dihedral or negative dihedral. Both dihedral
and anhedral are said to increase stability. Anhedral in birds is seen most
often during gliding. Hang gliders are built with anhedral wings.
oschmidt@xxxxxxx
Saturday, May 17, 2014
On May 17, 2014, at 7:22 AM, "Sally Nelson" <nelson_sm@xxxxxxxxxxxxxx> wrote:
> Thanks for suggestion. I did consider it at the time, but didn't notice the
> usual angle to the wing. Maybe it wouldn't show in the type of flight I was
> seeing? You know, if I were a techie birder, this would be home and dried,
> but alas...
>
> Regards,
> Sally
>
> ----- Original Message ----- From: "Paul Sullivan"
> <paultsullivan@xxxxxxxxxxxx>
> To: <obol@xxxxxxxxxxxxx>
> Sent: Saturday, May 17, 2014 7:10 AM
> Subject: [obol] Re: Hawk flight style questions
>
>
>> Osprey??
>>
>> ----------------------
>> [obol] Hawk flight style questions
>> . From: "Sally Nelson" <nelson_sm@xxxxxxxxxxxxxx>
>> . To: "OBOL" <obol@xxxxxxxxxxxxx>
>> . Date: Sat, 17 May 2014 06:48:59 -0700
>> OBOLinks,
>>
>> I don't experct miracle I.D.s here, though you all could if anyone could,
>> but
>> in the past couple of days, I have seen two buteo-shaped birds soaring alone
>>
>> over the first ridge of coast range foothills. They were at a more or less
>> 45
>> degree angle from me upsky (elevation? azimuth? up, anyway). The sky was
>> bright
>> silvery and the light all wrong to see any color or markings. So, silhouette
>>
>> raptor(s). Wings not remarkably long, pointed, tapered, or distinctive in
>> flapping. Tails not long, heads...present, but no details visible.
>>
>> #1 Soaring in wide circles drifting gradually north, BUT the wings were
>> always
>> flat or (and this is what got me) in somewhat reverse dihedral. So, not a
>> TV,
>> not like any Red-tail that I have watched (and a pair breeds right around
>> here
>> so I watch them often). I found a mention in Hawks in Flight that
>> Red-Shouldered Hawks will do that. Any others?? Shape and size (with no
>> comparison) would have worked for RS but...?
>>
>> #2 Yesterday morning, same location, soaring in smaller circles and drifting
>>
>> south. Bird might have been a Red-tail, though perhaps a small one; BUT it
>> also
>> soared flat or reverse-dihedraled (is there an official name for this?) AND
>> every couple of circles it HOVERED. It faced into the wind, spread its tail,
>>
>> and hovered right in place for 8 or so flaps. Size and shape eliminated
>> White-tailed Kite. I know Rough-legs do this when hunting, but so high up?
>> And
>> BOGR says only a few have been seen in Oregon as late as May, but??? I have
>> also seen Red-tails hover in a very strong wind (yesterday's was light and
>> variable) but not often and not well.
>>
>> So, any thoughts on buteo soaring shapes and/or dihedralness welcomed.
>>
>> Thanks,
>> Sally
>> west of Creswell, Lane Co.
>>
>>
>>
>>
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>
>
>
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