Back in the '70 I had the occasion to meet gadfly ornithologist Alan 
Phillips. As some of you know, he spend many of his years in Mexico 
doing field work. Alan had come to Wallops Island (NASA base in VA) 
and I took him on the island to study Semi/Western Sandpipers. While 
on the island we saw a Western Kingbird. He looked hard and agreed 
that it was a Western. He then said something to the effect that the 
wouldn't put it in print but he was almost inclined to think all the 
Tyrannus species were just one species! Although he, obviously, 
wasn't too serious he had seen enough interaction between the species 
in Mexico to think they were, at least, VERY closely related.

[Since Alan is no longer with us to refute what I've written, I take 
full responsibility for what I've written in this post.]

Charlie

At 09:00 AM 1/2/2007, you wrote:
>Hi All,
>I just want to add that the case of the unidentified Tyrannus in NY was
>presented as a probable hybrid between Cough's and Scissor-tailed
>Flycatcher by J. McGowan and K. J. McGowan at the IV NAOC meeting in
>Veracruz, Mexico last October. The photographic evidence presented in the
>poster was very convincing. The abstract for the poster can be viewed at
>this link:
>http://www.sgmeet.com/naoc/naoc2006/viewabstract2.asp?AbstractID=1873&SessionID=PS33
>
>Frode Jacobsen
>Baltimore, MD

Charles Vaughn
1306 Frederick Avenue
Salisbury, MD 21801

410-742-7221