4 Mallards and a female duck

I have just seen 4 Male ducks and a female near my flat on a grass area, one Male is on top of the fence and the rest are on the ground, two males in front and one Male with the female at the back.

They won't move from the spot but I've never seen them here before, its about 1.5/2 miles to the nearest pond and I'm worried about them because there are a lot of foxes seen around here they live in a garden next door and I'm worried they're going to get eaten!

I haven't gone near them because I'm worried they'll attack me as they wont move so what should I do, are they safe just standing there?