Talk:Hartlaub's duck

Upperwing
I've removed the following sentence from the article. Though it's referenced to Madge and Burn, that book makes no such claim, so it appears to be OR.
 *  Remarkably, the upper wing plumage pattern—perhaps the one reliable morphological marker for relationships in the ducks and their close relatives—is not only nearly alike in both species, but unique among all living waterfowl (Madge & Burn, 1987).

If someone can provide a reliable alternative source, it could be added back in. MeegsC | Talk 17:51, 20 July 2008 (UTC)