Date: 4/16/18 10:19 am
From: Marshall Iliff <miliff...>
Subject: [MASSBIRD] Re: Two Mew Gulls (one canus, one brachyrhynchus) at Cohasset

Photos and some discussion of the two Mew Gulls in my list here:

Liam Waters confirms that both are still present today. The weather
conditions are similar and it seems reasonable to expect they'll remain at
least through today, though they might clear out with changing conditions
tomorrow as this site is not a regular gull bonanza and in my experience is
good only under stormy conditions.

Since no brachyrhynchus has been available for chasing in Massachusetts
before, and since many believe that Mew Gull should be split at least two
ways and maybe three ways, it would be advisable to go after this one for
anyone who cares about their Massachusetts state list in the long term .It
also would be great to keep track of the gulls here and see if other
rarities drop in, since 9 taxa of gulls were present yesterday.


Marshall Iliff
eBird Project Leader

On Sun, Apr 15, 2018 at 2:22 PM, Marshall Iliff <miliff...> wrote:

> This morning Vin Zollo found an adult Mew Gull among 100+ Ring-billed at
> Sandy Beach, Cohasset.
> It was not present when I arrived at 12:30 (with Kathleen Rawdon) but
> appeared 30 min later. After much study and many photos, it seems very
> likely to be L.c. brachyrhynchus, the western USA/Canada subspecies and
> just the state’s second if so. Subspecies ID hinges on mantle color,
> structure and details of primary pattern and is discussed at (great) length
> in a recent Dutch Birding paper by Peter Adriaens and Chris Gibbins.
> Interestingly, I lost it at about 1:45 but spotted an adult, banded L. c.
> canus. This is a different bird than the recent Lynn/Nahant bird as it has
> a color band that seems to show 741.
> Much gull activity here in high surf. Seems likely to continue tomorrow
> given the forecast.
> Best,
> Marshall Iliff
> --
> ****************************
> Marshall J. Iliff
> miliff AT
> Westwood, MA
> ****************************
> eBird Project Leader
> Cornell Lab of Ornithology
> Ithaca, NY
> ****************************


Marshall J. Iliff
miliff AT
Westwood, MA
eBird Project Leader
Cornell Lab of Ornithology
Ithaca, NY

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