HI:
There are 3 identification articles in the latest issue of
BIRDING related to waterfowl that might be of interest:

Rare color variants of the Trumpeter Swan by Terry McEneaney. Pages
148-155.

Identification, molts, and aging of female-type wigeons by Cameron Cox and
Jessie Barry. Pages 156-165.

Exotic waterfowl in the ABA area by Steve Carbol. Pages 166-179.

--
Ian Paulsen
Bainbridge Island, WA, USA
A.K.A.: "Birdbooker"
"Rallidae all the way!"