Duck egg color variations? Muscovy / Blue Swedish

[Baylor]

I just put 7 duck eggs in the incubator Sat - problem is we are not sure if they are blue swedish or muscovy. Friend has both one of the muscovy ducks is currently sitting on a nest of 24 so not sure if this is another female or is the blue swedish. This nest was down towards the waters edge and the muscovy is 20 ft up in the oak tree (crazy duck)! The muscovy nest was full of feathers and you could tell was well tended - this nest was just a spot to lay an egg each day just burrowed down into the dirt - like what my buff / blue swedish used to build.
Any ideas of how to determine if they are muscovy or blue swedish? I know they have different incubation periods so that is my concern.

Thanks for the help!

 

[Kevin565]

Never had a female scovy so don't know what their eggs but did a quick search and came up with this

Blue Swedish: http://www.google.com/imgres?um=1&h...&w=900&h=585&ei=0d7STv_MDoaLsQKJmu2wDg&zoom=1

Muscovy: http://www.google.com/imgres?start=...&w=400&h=300&ei=KN_STqilMJOosAK76JTXDg&zoom=1

Also

 

[Baylor]

Thanks for the note back so quickly! I have been reading this website since Jan of 2011 and just finally decided to post some questions - most of the time I can find exactly what I need it is a wealth of information!
My blue swedish didnt lay eggs that looked like the one on the link - they looked very similar to the muscovy eggs

this might be tougher than I thought to distinguish between the two kinds of eggs.

 

[Kevin565]

Is there a noticeable size difference?

 

[Baylor]

The muscovy was sitting on her nest and hissing at me so I didnt dare uproot her to check out the eggs. These 7 eggs all are the same size and color (white/off white slightly) I just hatched some two weeks ago from the buff/blue swedish and these 7 look like those. But from pictures I have seen on the internet the muscovy and blue swedish might be similar in color - not sure on size, weight or anything else of the egg. I am wondering if there are differences when they are candled since the muscovy take a week longer to hatch - I assume they are more delayed in development?

 

[Baylor]

Does anyone know if the development timing is different on muscovy vs blue swedish?

 

[Kevin565]

Mallard Derived Breeds take 28 days to hatch while Muscovies take 35.

 

[Baylor]

Yes I realize the timing difference between the two - my concern is the incubation time if I stop turning on day 25 thinking I have blue swedish which are 28 days but in the end they are muscovy would I do damage not turning the eggs for those days?

 

[Baylor]

Also the increase in humidity over those days?

 

[WestKnollAmy]

My Muscovy and Blue Swedish lay what look to be the same egg. I can not tell the difference. Only my Pekin and some of my Runners lay a different type of eggs than the others and of course, the Cayugas.