Mike,
   I agree with Paul. Hybrids are probably extremely rare to begin with and
are unlikely to be seen as migrants. Black-caps that occasionally irrupt
into Maryland are mostly coming from Canada. Irruptions occur at irregular
intervals and to varying degrees. Most irruptions in recent decades have
been weaker than in the past. There has not been a major irruption of
Black-caps into the state since 1983. Since they have been seen in
significant numbers north of here I'll go out tomorrow near the state line
and see if I can find any in northern Carroll County.

On Tue, Oct 19, 2010 at 6:40 PM, Paul Woodward <> wrote:

> Mike,
>     I would be skeptical that the bird you saw was a hybrid.  I'm not sure
> that hybrid chickadees ever move significant distances from their nesting
> areas.  The black-caps that are moving south now are from the more northern
> areas not the closer populations.
>
> Paul Woodward
> Fairfax City, VA
> 




-- 
Bob Ringler
Eldersburg MD