The "Handbook of avian hybrids of the world" By Eugene M. McCarthy
(Oxford University Press US, 2006) lists only two hybrids from the
American Robin (Turdus migratorius) and one mistaken hybrid.

Turdus leucomelas (Plae-breasted Thrush) x Turdus migratorius

Turdus merula (Common Blackbird) x Turdus migratorius

Turdus migratorius x Turdus philomelos (Song Thrush)

Which are all odd because they're American Robin males and various
European thrushes but the reports are from European Zoo and from the
early 20th century. But that could be just weird Brits at London Zoo
trying to make a "Super Thrush".

I'm not surprised by the Common Blackbird as that is essentially the
same role (and very similar song) in the UK and Europe as the
American Robin has in North America. Think "all black American robin
with yellow beak that loves to sing early in the morning".

That said see also p33 in the book on Underreporting with all of it's
caveats. They may hybridize but as of 2006 it hadn't appeared in the
literature.

I think to show youhave a real hybrid you'd need a lot of evidence
(photographs, in the hand examination, perhaps even a "collected" bird).

It's on Google Books (or your local library)

<http://books.google.com/books?id=iZhKTNkpxUIC>

http://books.google.com/books?id=iZhKTNkpxUIC

On Jun 3, 2009, at 9:25 PM, Valerie Elliott wrote:

> I'm curious if anyone has ever seen or heard of a robin/varied
> thrush hybrid. I believe I saw one in Wyoming last week, but have
> never heard of such a hybridization. Any help would be
> appreciated. Feel free to contact me at my email address.

--
Kevin Purcell
kevinpurcell at pobox.com