how long should it be before my duck eggs hatch

[LoveToFarm]

Hi last night was day 26 and i candled my 8 duck eggs some had they beaks in the air cell and some didnt this morning i could hear them chirpping but not very much they dont wabble around much and only make noises once in a while. so my ? is how long before i see them pip the shell and when would i have to help them if need to?

 

[JimnTer]

It depends on the type of duck. Most ducks take 28 days, but Muscovies take 35.

 

[LoveToFarm]

i think they are mallard but not sure.