Kevin has nailed it. It's a Great Black-backed. Size can be attributed to being a small female, or simply variation within the species.
Bob Lewis Sleepy Hollow NY --- On Thu, 10/4/12, Kevin J. McGowan <[email protected]> wrote: > From: Kevin J. McGowan <[email protected]> > Subject: RE: Update RE: [ebirdsnyc] Fwd: [nysbirds-l] Poss SLATY-BACKED GULL > - Cohoes/Waterford > To: "NYSBIRDS-L" <[email protected]> > Date: Thursday, October 4, 2012, 7:32 PM > Thanks, Will, those are helpful. > > From the additional photos I see a dirty back of the neck > that is very suggestive of Slaty-back, as well as a sense of > the smaller size and maybe lighter back. But, the bill > shape, the extent of the white edging of the tertials and > scapulars, and the leg color are all wrong. > > Kevin > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] > On Behalf Of Will Raup > Sent: Thursday, October 04, 2012 7:15 PM > To: [email protected]; > NYSBIRDS-L > Subject: RE: Update RE: [ebirdsnyc] Fwd: [nysbirds-l] Poss > SLATY-BACKED GULL - Cohoes/Waterford > > > > I've coped the other 3 photographs that were taken by John > Hershey and posted on HM Birds. > > http://www.flickr.com/photos/danikabelle/8055096162/in/photostream > > http://www.flickr.com/photos/danikabelle/8055096343/in/photostream > > http://www.flickr.com/photos/danikabelle/8055096603/in/photostream > > http://www.flickr.com/photos/danikabelle/8054880897/in/photostream > > These are all the known photographs at the moment. > > Will Raup > > Albany, NY > > > > ---------------------------------------- > > Date: Thu, 4 Oct 2012 19:09:55 -0400 > > Subject: Re: Update RE: [ebirdsnyc] Fwd: [nysbirds-l] > Poss > > SLATY-BACKED GULL - Cohoes/Waterford > > From: [email protected] > > To: [email protected] > > > > Echoing the points made by Kevin, I assume we are > discussing the > > subadult bird on the right? > > > > My immediate impression is of a Great Black-backed Gull > (charcoal > > rather than bluish tone of mantle, rather flat head > shape, square > > proportions of body, limited white tertial crescent, > dull leg color > > etc) but of course would like to see additional images > and hear from > > the observers as to what focused their attention. The > size difference > > mentioned earlier isn't especially obvious in this > picture and one has > > to remember that male and female gulls differ in size, > this being most > > noticeable in the large species. > > > > Cheers, Angus Wilson > > New York City > > > > -- > > > > NYSbirds-L List Info: > > http://www.NortheastBirding.com/NYSbirdsWELCOME > > http://www.NortheastBirding.com/NYSbirdsRULES > > http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.ht > > m > > > > ARCHIVES: > > 1) http://www.mail-archive.com/[email protected]/maillist.html > > 2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L > > 3) http://birdingonthe.net/mailinglists/NYSB.html > > > > Please submit your observations to eBird: > > http://ebird.org/content/ebird/ > > > > -- > > > > > -- > > NYSbirds-L List Info: > http://www.NortheastBirding.com/NYSbirdsWELCOME > http://www.NortheastBirding.com/NYSbirdsRULES > http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.htm > > ARCHIVES: > 1) http://www.mail-archive.com/[email protected]/maillist.html > 2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L > 3) http://birdingonthe.net/mailinglists/NYSB.html > > Please submit your observations to eBird: > http://ebird.org/content/ebird/ > > -- > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2012.0.2221 / Virus Database: 2441/5310 - Release > Date: 10/04/12 > > -- > > NYSbirds-L List Info: > http://www.NortheastBirding.com/NYSbirdsWELCOME > http://www.NortheastBirding.com/NYSbirdsRULES > http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.htm > > ARCHIVES: > 1) http://www.mail-archive.com/[email protected]/maillist.html > 2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L > 3) http://birdingonthe.net/mailinglists/NYSB.html > > Please submit your observations to eBird: > http://ebird.org/content/ebird/ > > -- > > -- NYSbirds-L List Info: http://www.NortheastBirding.com/NYSbirdsWELCOME http://www.NortheastBirding.com/NYSbirdsRULES http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.htm ARCHIVES: 1) http://www.mail-archive.com/[email protected]/maillist.html 2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L 3) http://birdingonthe.net/mailinglists/NYSB.html Please submit your observations to eBird: http://ebird.org/content/ebird/ --
