The pond is still in the development stage, and having moved plants from a 'natural pond' which dries out frequently plus frog spawn that was in it, I was very pleased that the taddies were developing, then yesterday early morning I noticed a Mallard. At first I thought it must have 'roosted' there overnight as he had his head tucked in. He was like that for ages, then had a stretch, looked around and began eating either the greenery or the frog spawn. I like the way his reflection looks as if he is wearing a hat - bit like Donald.
Had the same thing happen in my garden last week, I've had a pair of mallards visiting, but the female found the tadpole pond & I had to net it off to save them - not that they're exactly in short supply.
The problem got solved for me though, since the female had decided to overnight by the main-pond UV device, nice & warm I guess.
I thought she was well hidden under the cover of ground elder, but a fox (I think) found her, and the back of the garden is now littered with mallard feathers.
Funny thing is since she was pretty gravid & I thought she might be about to lay, I had decided to oblige her & bought an £85 flat-pack floating duck house to put on the main pond, but she got got before I even had a chance to unpack it!