how old do muscovies start laying?

1.) shes to young.
2.) muscovies are seasonal layers. (meaning they dont lay in winter or fall)

my answer will be a little different due to location. i'm in australia and my girls lay 4 times a year, 3 times in spring/summer then once in winter, where i live we dont get snow but we get bad frosts, enough to effect the hatch rates during winter ,but some still hatch. say 4 to 6 out of 20. in general  muscovy are thought to be mature at 7 months, i've had some lay at 5.5 months and i think i saw someone on here who had them lay earlier than that!

Do you mean they lay a clutch, set, brood and wean the ducklings and then start another set four times a year or what ?  How long does a "time" last ?

i take the mums away at three weeks, so right now i have 13 week old ducklings and the mum has just hatched out another lot a week ago, so thats a 12 week turn around. she'll most likely have another lot hatched out by the end of the season here while its still a bit warm at the end of march into april. they are baby making machines!

Mine started at 4mths... and the one has almost never stopped laying everyday since.. now i have two laying again.. and i definitely have winter(well below freezing, I'm in Canada).. so them not laying in fall/winter has not been my experience, i just got another two eggs again today and it was -11C last night brrr.

Muscovy need to be at least 1yr to be sexually mature.

Are you sure those eggs are coming from a Muscovy? I have never heard of one laying that young.

they do lay in winter. i am in mid tenn and my scovy duck has laid 9 eggs and the last three were three days in a row, tommorow will be four eggs. i also think she is wanting to set. she hangs around the nest box during the day.

Mine are 7 months old now and one started to lay about 6 weeks ago and lays one egg a day. We do not have same winter temps here as in other parts of the world though.