Hi Karen,

Sounds like one of the hybrids known as "Brewster's" Warbler which can be
rather variable. There are some good examples of these illustrated in both
Sibley and the Peterson Warbler book. Where was your Connecticut Warbler
(that is, within the Arboretum?) Was it an adult or a young bird?

Thanks,
Gail Mackiernan

on 09/06/2010 2:48 PM, Karen Harris at  wrote:

> Bill and I spent the morning at Adkins Arboretum, running into many
> mixed flocks 
> of birds. One of the birds we came across might be a hybird of the Blue-winged
> Warbler. Not having come across one before, it is hard to be definite. The
> bird 
> had blue wings with dull wingbars. The head had the black eye line, but the
> face/neck was pale whitish yellow.. The body was pale yellow. What made it
> more "different" was that a true Blue-winged Warbler was seen just afterward,
> making us comment on how different the first was. The other birds of note:
> 
<snip>