The head shape is that of a Lesser Scaup, rather than the more round-headed look of a Greater. In addition, that the highest part of the crown is toward the rear rather than at the front, is also a strong indication that it is a Lesser. Jeff Gilligan On Apr 10, 2014, at 12:53 PM, Kathleen Krall <krallfamily@xxxxxxxxxxx> wrote: > Michael and I spent 3 weeks birding in Costa Rica last month, partly on our > own at highly recommended Bosque del Rio Tigre lodge and at San Vito, near > Panama, and partly on a wonderful Road Scholar birding trip. Our local guides > saw and/or heard an incredible 445 species, although we wouldn't count that > many, if we were listers. > This photo of a scaup female was taken by Michael, shooting into late > afternoon light from a boat at quite a distance. It was with a group of > Blue-winged Teal. > It looks like a Lesser Scaup by head shape, but does the amount of white near > the bill look more like a Greater Scaup? Lesser Scaup are seen in Costa Rica, > but Greater Scaup have only been reported a few times. Any thoughts? The > sighting was too far off for the guide to make a definitive ID at the time. > We have only the one photo and did not see the bird fly. > > http://s1168.photobucket.com/user/krallfamily/media/imagejpg1_zpsf5227375.jpg.html > > Kathy and Mike Krall > > Sent from my iPad