Howdy, Michael, et al
During the last 20 years here in lowland Snohomish County, we've noted
rather dramatic increases in Green Herons (also, possibly American
Bitterns -- that wonderful "goonk-a-loonk" song activity seems to be
gradually increasing), Gadwalls, Lincoln's Sparrows (winter), Ospreys
(primarily at the mouth of the Snohomish River, but elsewhere in the
County), Bald Eagles, wintering Trumpeter Swans, wintering Peregrine
Falcons, Turkey Vultures and, of course Barred Owls. These, of course
aren't necessarily "range expansions" but seem to represent population
increases.

Darrell Smith
Senior Habitat Specialist
Snohomish County Surface Water Management Division,
Snohomish County Public Works Department
2731 Wetmore Suite 300
Everett, WA 98201
Office Phone 425 388-6497
darrell.smith at co.snohomish.wa.us


-----Original Message-----
From: Scuderi, Michael R NWS
[mailto:Michael.R.Scuderi at nws02.usace.army.mil]
Sent: Monday, April 03, 2006 10:43 AM
To: tweeters at u.washington.edu
Subject: [Tweeters] Changes in bird populations in Washington over that
lasttwenty years


Hi Tweets,

A group of biologists here at work were discussing avifaunal changes in
the
past twenty years in relation to global warming, and other influences.
Dennis Paulson and I think Klaus Richter have previously discussed this
issue. Anyhow, we started a list of bird species we believe have
expanded
their range into Washington in the last twenty years:

Canada goose
Eurasian widgeon
Anna's hummingbird
Barred owl
White tailed kite
Red shouldered hawk
Scrub jay
Tricolored blackbird
Acorn woodpecker
Lesser goldfinch
Black Phoebe
Eurasian collared dove

Does anyone have any additions (subtractions??) for this list?

Michael R. Scuderi
Environmental Resources Section
Seattle District Corps of Engineers
P.O. Box 3755
Seattle, WA 98124-3755
(206)764-7205
(206) 764-4470 FAX
Michael.R.Scuderi at usace.army.mil

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