Date: 3/29/21 11:26 am
From: Robert O'Brien <baro...>
Subject: [obol] Re: Is this a juvenile ring necked duck or something else?
OK. After these Scaup lessons, see if you can *nail* the IDs in this scaup
quiz.
Photo taken Sunday March 16, a few miles west of Toledo on Yaquina Bay\.
Keep your eyes peeled for a couple of Waldos while you are at it.
Bob OBrien Carver OR
PS Large file, you'll have to scroll.



On Sun, Mar 28, 2021 at 8:10 PM Roy Lowe <roy.loweiii...> wrote:

> I banded nearly a thousand scaup on San Pablo Bay in 1979. To insure we
> recorded the correct species we followed that bird banding manual which
> indicated the exclusive way to separate the two species was to measure the
> width of the nail of the bill just as Lars said. After measuring the first
> 40 or so birds we banded all were lesser scaup with narrower nails so I
> quit measuring. A few birds later my co-worker handed me another scaup and
> the bird felt noticeably larger in my hand so I measured the nail and sure
> enough it was a greater. After that I could tell when I had a greater in
> my hand just by how it fit. I doubt that you can tell size accurately by
> sight but it was easy in hand when handling a lot of them.
>
> Roy Lowe
> Waldport, OR
>
> On Mar 28, 2021, at 5:05 PM, larspernorgren <larspernorgren...>
> wrote:
>
> 
> My father and uncle hunted Scaup on Long Island Sound in the 50s.
> Conservation officers used calipers to measure the characteristic described
> by Ed as their exclusive means to distinguish Greater from Lesser. The
> water in the photo seems very shallow, which Lessers frequent and Greaters
> avoid.
>
>
>
> Sent from my Verizon, Samsung Galaxy smartphone
>
> -------- Original message --------
> From: ed mcv <ed.mcvicker...>
> Date: 3/28/21 4:49 PM (GMT-08:00)
> To:
> Cc: obOL <obol...>
> Subject: [obol] Re: Is this a juvenile ring necked duck or something else?
>
> i would call this a lesser scaup based on the relatively small, narrow
> bill nail. greater scaup have a much more prominent dark bill nail that
> has been described as the bird wearing lipstick. bit of an exaggeration
> but still a reliable characteristic for differentiating greater v. lesser.
> head shape and color can vary but the bill nail remains fixed. here's
> <https://www.birdzilla.com/bird-identification/id-skill-development/bird-families/waterfowl-identification/duck-identification/identification-of-diving-ducks/comparison-of-greater-and-lesser-scaup.html>
> a good look for comparison.
>
> ed mcvicker
>
> On Sun, Mar 28, 2021 at 2:00 PM Harry Fuller <atowhee...> wrote:
>
>> can't see head shape but this is female scaup...Greaters have round heads
>> while the more-often shallow-water
>> tolerant Lessers have angle at back of the head
>>
>> On Sun, Mar 28, 2021 at 1:17 AM joy shreyer <dmarc-noreply...>
>> wrote:
>>
>>> We saw this duck along with a male and female ring necked duck on Monday
>>> March 22 at Ridgefield NWR in WA. But not sure of its identity.
>>> Joy Shreyer
>>> Silverton
>>>
>>>
>>>
>>>
>>
>> --
>> Harry Fuller
>> author of: *San Francisco's Natural History: Sand Dunes to Streetcars:*
>> https://ecowise.wordpress.com/2017/04/20/sfnh/
>> author of *Great Gray Owls of CA-OR-WA*:
>> https://ecowise.wordpress.com/2015/05/08/the-great-gray-owl-book/
>> author of *Freeway Birding*: *freewaybirding.com
>> <http://freewaybirding.com>*
>> birding website: http://www.towhee.net
>> my birding blog: atowhee.wordpress.com
>>
>

 
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