Through the miracle of modern technology: something I could not have
done in 2004...
I have created a map of first detections by location for the 2004
season. The progress of the migration was fairly uniform from
season to season beginning up the coast, and time lag than movement
eastward (apparently) up major river systems into the Great Basin.
https://drive.google.com/open?id=1xUWvM-wv7deCV7QOcrXehGalpf3DppyC&usp=sharing
--
Mike Patterson
Astoria, OR
Bald Eagles - a gateway bird
http://www.surfbirds.com/community-blogs/northcoastdiaries/?p=3709
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