ZIMMERMAN, D.A. 1973. Range expansion of Anna's Hummingbird.
Am. Birds. 27:827-835.

Ian Paulsen wrote:
>
> HI ALL:
> Are there any articles/papers that document the range expansion of the
> anna's Hummingbird? I vaguely remember one in "Western Birds" some time
> ago.
> sincerely
>
> Ian Paulsen
> Bainbridge Island, WA, USA
> ipaulsen at krl.org
> A.K.A.: "Birdbooker"
> "Rallidae all the way"

--
Mike Patterson
Astoria, OR
celata at pacifier.com

A child who becomes acquainted with the birds about him
hears every sound and puzzles out its meaning with a cleverness
that amazes those with ears who hear not.

-Neltje Blanchan

http://www.pacifier.com/~mpatters/bird/bird.html