Greater Scaup (Aythya marila), Kiwanis Park Lake, Maricopa County
This Greater Scaup was
discovered and photographed by Pierre Deviche on 27 December 2008 at Kiwanis
Park in Tempe.
Although regular in winter in the Lower Colorado
River Valley, Greater Scaup is a rare winter visitor to the rest of the state.
It is difficult to identify and may be overlooked. The third photo in this
set provides a nice comparison of Greater and Lesser Scaup in relaxed swimming
posture. The differences in head shape and bill size are particularly
This is a Greater Scaup because of the consistently round head, relatively
large bill with wide black nail at tip.
White in wings during flapping extends to proximal primaries.
Usually Greater Scaup has whiter flanks than Lesser. The relatively gray
flanks of this individual may suggest that this is a hatch-year male.
27 December 2008, photo by Pierre DevicheAll photos are copyrighted© by photographer
Submitted on 27 December 2008