Subject: Re. Vaux's Swift
Date: Apr 26 10:13:11 1997
From: jcbowling at mindlink.bc.ca - jcbowling at mindlink.bc.ca


Addressed to: tweeters at u.washington.edu
Michael Price <mprice at mindlink.net>

I made a slip of the fingers in my previous post. The May 1-2 date of arrival
for Vaux's Swifts is for *central* BC, not southern BC as I stated. Michael
Price will no doubt catch this boo-boo. I believe it is mid-April for southern
BC so the timing of their migration is actually a bit late rather than early!
For aerial insectivores such as swifts, weather conducive to ascending air
which carries insects aloft must be crucial to their northward movement. That
situation rampant over Tweetersville today as all of WA and the southern half
of BC currently lie in the warmer air ahead of the offshore cold front.

- JB

Jack Bowling
Prince George, BC
jcbowling at mindlink.bc.ca