I'm a Father (so to speak)

This morning I discovered a mother duck nesting below my dining room windows behind the shrubbery. It appears to have at least 5 or 6 eggs in its nest.

I'm concerned, though, because it appears to have a blue plastic ring of the type found on screw-top drink bottles around its neck.

Obviously, it must be a pretty much full grown adult, so I'm hoping it isn't going to grow anymore and be be choked by the ring. It wouldn't let me get near enough to try to remove it.

I'm going to have to find out how long it takes for the eggs to hatch, when I can expect a batch of little waddlers.