We have a natural pond in our garden and have tried to stock it with fish, on several occasions, only to lose them to predators
There is a beautiful weeping willow beside it.
We do manage to keep a pair of Moorhens that breed successfully every year. The mallards come each spring to muscle in on their territory but they defend it vigorously. It is a delight to see the "tiny dots", as we call them, emerge each spring.
This pond needs attention. It requires a digger with a long reach to dig out all the silt and to clear some of the weeds. A spring runs through it so the water stays fresh. I grow watercress, that I never pick, and Chris tries to clear it all out because he hates anything that spreads.