Thanks to everyone who responded to my request for help with the grebe ID.
The responses were unanimous that it was a winter plumage Red-necked Grebe.
The "photo" is actually a screen grab from one of our films. And, there were
actually two grebes. If you're interested, take a look:

_http://www.pinelakefilms.com/mukilteo1.html_
(http://www.pinelakefilms.com/mukilteo1.html)

Linda Davey
on Pine Lake
Sammamish, WA