I was out photographing ducks and killdeer when my feet got totally stuck in the mud in an area that was recently drained. It was so bad that I had to pull my feet out of my shoes and walk barefoot and dig my shoes out of the mud (with shoes, I sank in about a foot, without, not so much). I noticed killdeer tracks around there and they've been sinking a half inch or inch, it looks like. But, the ducks didn't sink so much. I'm a little worried about my little killdeer breaking their legs in the mud, but they seem to be doing OK, not standing on it long enough to get totally stuck, plus they're lighter and have little pads on their feet for running around on wet sand. But, do ducks ever get stuck in the mud? Do their web feet protect them from that? I'm just wondering. Everyone's fine when I left, the killdeer, the ducks and geese, so this is just a curiosity thing.