According to Gabrielson and Jewett (1940) there are to subspecies
that occur in the Pacific Northwest. "Northwestern" Robin (Turdus
migratorius caurinus) and "Western" Robin (T.m.propinquus).

Caurinus is described by Pyle (1997) as small, brown to brownish-
gray upperpart with medium-pale to medium-dark rufous-orange breast
and belly. It has very little or no white tips to the outer
rectrices.

Propinquus is large, pale to medium brown-gray upperparts with
pale to medium rufous without orange tinge. It has very little or
no white tips to the outer rectrices.

Pyle also notes "aleucus" which he calls a clinal variant of
propinquus which is smaller, browner and has less white in
the tail than Rocky Mountain forms.

There is (I'm guessing) a good chance of "Eastern" Robin T.m.migratorius
which Pyle lists as breeding From Alaska to c-BC (presumably east of
the Rockies). It is described as medium in size, medium-brownish to
dark brownish dusky uppers and medium to dark rufous tinged in orange.
Tail spots are medium to large.

GizaTheCat at aol.com wrote:
>
> Greetings Tweets!
>
> I've got a Robin question.....
>
> How many varieties of Robins do we have in the Puget Sound area? I spotted
> one in my yard that was smaller and a bit chunkier than most, had a very dark
> head and deep orange breast and no streaks on its chin. It was rather like a
> Varied Thrush without the stripes and markings. I know it was a robin
> because of its longish yellowish bill.
>
> Please send a private reply in addition to responding on the list. AOL turns
> Tweeters into a Mime file that has to be converted into a Word file before I
> can read it! Any advice on this? MSN kept knocking me off Tweets and that's
> why I'm here.
>
> Lydia Gaebe Bishop
> Somewhere near Lake Cassidy, Snohomish County, WA

--
Mike Patterson
Astoria, OR
celata at pacifier.com

http://www.pacifier.com/~mpatters/bird/bird.html