Posted by Bruce Deuel (165.235.110.82) on December 17, 2001 at 14:47:27:
Right now, I'm agreeing with Gary that all 3 birds are Greater Scaup. As further evidence for the female in the upper picture I would cite Nat. Geo. 3rd ed.:
"Some female Greater Scaup, especially in spring and summer, have a paler head with a distinct whitish ear patch."
Cheers,
Bruce Deuel
Red Bluff, CA