Sorry for the late post but I spent two hours searching for the Sabines gull to no avail. Some birds were up in the NW corner of the lake and I couldn't get close enough to them to see if it was there. A lot of gulls were close at that mark of about a mile north of the exit and I did see a Franklins Gull and two Bairds sandpipers. No terns were present either.
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