Tweets,

An important aspect of these extinction totals is the proportion of extinct
birds that inhabited isolated oceanic islands, where they are far more
vulnerable to human intrusions of various kinds. It seem likely that a large
majority of extinctions are from such populations.

Gene Hunn
Sonoma, CA
enhunn323 at comcast.net

-----Original Message-----
From: tweeters-bounces at mailman2.u.washington.edu
[mailto:tweeters-bounces at mailman2.u.washington.edu] On Behalf Of Robert
Cleland
Sent: Thursday, December 09, 2010 2:45 PM
To: Tweeters
Subject: [Tweeters] Re: bird extinctions

A biology colleague of mine said he had been told that since 1000 AD there
have been nearly 1000 birds that have gone extinct. He didn't know the
source of this figure. Does anyone out there have a reference to such a
figure, or have strong feelings about whether it is correct? 1000 seems
high to me.

************************
Robert Cleland

Professor (Emeritus), Biology Dept. Box 355325
Univ. of Washington
Seattle, WA 98195-5325
Phone (206) 543-6105; FAX (206) 685-1728

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