We've got 10 ducks and 5 chooks. They live in different houses. The chooks go in as soon as it tends to get dark, but in the summer the ducks need chasing in at midnight (or when we go to bed). They do seem to have different light sensitivity...I would not put them into the same night quarters, as ducks are much messier than hens and the ducks also never had any parasites and I would like to keep it that way (as they are hellish to catch...).
Ducks make an awful mess in the garden, be prepared for mud in wet seasons and concrete in dry where you used to have grass
I will now have to fence off and reseed after the second wet winter...
I do have a funny mix, they interbreed happily. If you are into pure breeds, only keep one variety or eat all the eggs