Larry and all,
My early record for dowitcher is March 4, 2007 at Otter Slough.  I had 50 total and 30 or so Lesser Yellowlegs. 
I have no other shorebird records for the period March 1-March 7. (excepting Killdeer and Woodcock).

Dave Rogles
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St. Charles Co.
The Audubon Society of Missouri's Wild Bird Discussion Forum
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