Ring -necked Duck

Today, April 28, 2013  i went to the mouth of the Takhini river again.
And Mary pointed some Ring-necked Ducks out that i hadn't noticed yesterday.

Today swans (6)
ring-necked ducks
northern shovelers
barrow's goldeneyes
common goldeneyes
buffleheads
pintails
and down river a pair of mergansers

four swans arrived as we got there,
The two swans yesterday, had yellow/orange stained heads, compared to two pure white birds i saw here two weeks earlier.
Now the four new ones even stained darker then the two already there.
Apparently it is the where they come from, if they have been digging around in the mud in iron rich waters.