Little egret

It used to be Little egrets weren't UK birds at all. Then they took root in the South of England. They've been gradually spreading, and have been nesting in these parts for quite a few years now.
We came across this one on a walk with Finn. You usually see them puddling in rivers, or perched in trees, or flying overhead with their legs outstretched behind them. I have no idea what this one was looking for.
Unfortunately you can't really make out the yellow feet.