I rather fancy the duck to the right is a female Northern Shoveller as the bills are quite distinct; the right side bird's bill is very large and although the angle isn't good, it does look like a shoveller type bill. The unmistakable Northern Shoveller drake is below.
I love the legs on these aptly named Stilts
One of these days I will get on top of these birds and get some decent shots. However I enjoyed myself sitting out drenched in late afternoon sun with a cooling breeze keeping it just bearable. I took the few photo opportunities available and must wait for another opportunity for better shots and indeed for Comb Duck.