I'm not sure now, because the bill doesn't look orange.
Common Merganser (Mergus merganser)
Spotted while on wilderness patrol.
Four, flying upstream over the Winooski.
Mergansers on the South Fork of the American River, just upstream from Folsom Lake. It was a dam release day, with higher water levels on the river. The mergansers were floating on the current, then periodically diving to hunt.