juv THAYER'S GULL, Windsor Landfill

My first landfill visit of the season was highlighted by a crisp juvenile THAYER'S GULL among 1000+ LWHGs working the trash piles. Interestingly it was the only uncommon gull present...not a single Iceland, Glauc or LBBG. It's a small landfill that can be very hit or miss, but has a track record in recent years of pulling in some nice birds (two Slaty-backs and a few Thayer's). Let's hope this is the start of a productive season.

For anyone looking for the bird, some ID features to note are:

- more delicate head/bill structure than HEGU, heavier-bodied than most Kumlien's Gulls
- all black bill with just the slightest hint of paling at the base of lower mandible
- faint mask through the auriculars, more visible at some angles than others
- apparently all juvenile scapulars
- dark-centered tertials with marbled edging
- dark brown primaries (but not blackish) with thin pale fringes as seen on the folded wing
- short pinkish legs

In flight:
- dark outer webs of outer primaries contrast with pale inner webs ("Venetian blind" appearance)
- contrasting dark secondary bar
- dark tail band with marbling at bases of rectrices
- brown underwing linings contrast with whitish underside of flight feathers, with thin dark tips to outer primaries






















juv Thayer's Gull

- NB

Comments

  1. BenDecember 6, 2011 at 8:23 PM

    I see you're making good use of that camera. Nice flight shots of a nice find.

    ReplyDelete
  2. Nick BonomoDecember 6, 2011 at 10:11 PM

    Thanks Ben

    ReplyDelete
  3. AnonymousDecember 13, 2011 at 11:20 AM

    This is a nice blog Nick .

    André Boven Holland Eu

    http://birdingoldambt.blogspot.com/

    ReplyDelete

Post a Comment

Popular posts from this blog

Warblers in Flight: A Photographic Collection

While active migration has always been my favorite bird behavior to observe, my interest in the phenomenon called “morning flight” of nocturnal migrants had been minimal due to the unfortunate reality that I lived well over an hour’s drive from the nearest known reliable observation site, Bluff Point State Park in Groton, CT. In autumn 2020, thanks to improved public access to Hammonasset Beach State Park in Madison, CT, I began to explore the northern tip of Willard’s Island as a morning flight viewpoint and was pleased to find that under the right conditions a reliable flight could be observed there. The volume of birds passing through is not large (a small fraction of what passes through Bluff Point), but the flight line is consistent and can be observed under good lighting conditions. Between autumns 2020-22 I visited the site 20 times in total and recorded 27 warbler species in morning flight. All but a few of these have been photographed, often poorly! I immediately found mysel
Read more

Last winter's gull review

Today's cooler, blustery conditions combined with the appearance of an Ivory Gull in Cape May got me thinking more about the upcoming gull season and reflecting on last year's. The 2008-09 gulling in the northeast was pretty damn good and included a few really exciting birds. The season started out with a bang exactly one year ago today with CT's first Slaty-backed Gull . On 12/12 an adult Thayer's Gull put in a brief appearance at the Windsor-Bloomfield Landfill, CT's premier gull hotspot, followed by a first-winter bird on 12/23. A Black-headed Gull spent the winter in New Haven Harbor. Perhaps 'gull of the year' was a subadult Glaucous-winged Gull in Rochester, NH, found by Scott Young...a first record for New England. Meanwhile Gloucester, MA was once again the gull capital of New England. I happened to already be up in Boston when news of an adult Ivory Gull broke on 1/17. I still get chills thinking about that weekend. Of course there were plenty
Read more

Iceland in April

Image
April is an exciting time for the nature enthusiast to visit Iceland. While the weather can still be quite cold and snowy, winter's grip is loosening and signs of spring abound. Several minutes of daylight are gained each day, but there is still enough nighttime darkness to observe the aurora borealis through at least mid-month. It turns out that early spring is also an excellent time for whale watching, particularly if you are keen to find Orcas. Spring migrants are beginning to arrive, including flocks of European Golden Plovers and the first Atlantic Puffins of the year. Given all that, it made sense to consider a long weekend visit to Iceland in mid-April, especially since it is a direct 5-6 hour flight from the northeast USA. Known appropriately as an expensive destination to visit, costs can be considerably reduced by hiring a campervan. Being a super popular mode of transport + lodging in Iceland, there are plenty of companies to choose from. During this shoulder season, I r
Read more