I saw my first Faux Pas of the season.
It was in my first message to tweeters, where I forgot to
indicate that I was:

Doug Daily ddaily at u.washington.edu , Seattle WA USA Earth

Also regarding robins:

Among a large flock of robins I noticed one which is larger
than normal and has a lot of white, more or less randomly
feathered about.

Any theories? Just an anomaly or can robins interbreed with
any other thrushes?

When I first saw it, I thought it looked like a cross between
a robin and a rufous sided towhee.