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Re: [AK Birding] The gull

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  • Cathy Foerster
    I agree. I ve already kinda augered in on Thayer s as the i.d. for this guy. ________________________________ From: Martin Renner To:
    Message 1 of 2 , Aug 6, 2012
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      I agree. I've already kinda augered in on Thayer's as the i.d. for this guy.



      ________________________________
      From: Martin Renner <great.auklet@...>
      To: AKBIRDING <akbirding@yahoogroups.com>
      Sent: Monday, August 6, 2012 1:13 PM
      Subject: Re: [AK Birding] The gull

      Tertials are really dark on this picture by kcbirder:
      http://groups.yahoo.com/group/AKBirding/photos/album/479517457/pic/534005983/view?prop=eupdate

      Given how light the back is, as shown on Aaron's shots, I wonder whether this is a bird in 2nd summer, moulting into 3rd winter. This would then be a strongly worn/bleached bird in an already light plumage. Under those circumstances, an Iceland Gull of either subspecies should be pretty much white and shouldn't show these dark tertials or primary tips. Even ignoring where this bird was found, 'Thayer's Gull' seems to be the more fitting ID to this bird. Compare how young Glaucous-winged Gulls look like these days: many birds may look identical to Glaucous Gull in plumage.

      Cheers,
      Martin Renner




      On 5 Aug 2012, at 08:56 , Aaron Bowman wrote:

      > Well said!  Sometimes they just don't fit a tick in a box, lucky bird.
      > Looking forward to being down in Homer and Anchor Point for a few upcoming eBird tutorials I am organizing for Audubon Alaska.
      > They will be this coming weekend on Saturday at the Wynn Nature center, and at Anchor Point (with the Keen-eye Birders) on Sunday.  Let me know if you are around and want to get together for some birding before, after or during the events.
      >
      > Hope all is well,
      >
      > Aaron
      >
      > On 08/04/2012 12:12 PM, Martin Renner wrote:
      >> OK, I'll stick my neck out. Based on moult and all-dark bill, I'd agree with Aaron that this is a 2nd calendar year (first summer) gull. In Iceland Gulls, this plumage is the lightest, some birds approaching all white in appearance. Given that this bird is a fair distance from this extreme, I think that is that this bird falls well within the huge overlap between Thayer's and Iceland and is probably unidentifiable. In Newfoundland, nobody would hesitate calling this an Iceland Gull. Here, I think it will have to remain in the unresolved category.
      >>
      >> My 2 cents.
      >>
      >> Martin Renner
      >>
      >>
      >>
      >> On 3 Aug 2012, at 22:57 , davidsonne@... wrote:
      >>
      >>> Keys took these photos of a bird which I think looks like Iceland in the
      >>> pond behind the library. Any comments welcome
      >>> Dave
      >>>
      >>>
      >>>
      >>> ____________________________________
      >>> From: flybynightclub@...
      >>> To: davidsonne@...
      >>> Sent: 8/3/2012 9:11:02 P.M. Alaskan Daylight Time
      >>> Subj: The gull
      >>>
      >>> Hi Dave,
      >>> Thanks for the call. Is this the gull? If this photo shows anything that
      >>> yours didn't show, feel free to use it.
      >>>
      >>> thanks,
      >>> keys
      >>>
      >>> [Non-text portions of this message have been removed]
      >>>
      >>>
      >>>
      >>>
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      >>
      >>
      >> ------------------------------------
      >>
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      >>
      >>
      >>
      >> .
      >>
      >



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