I had a muscovy duckling rescued at 2 weeks old after all her siblings were taken by predators and her Mother abandoned her. She was then raised alone until 6 weeks. She definitely knew she was a duck.
I found a peach-orange-colored egg yesterday evening at the lake. It looks like this one: http://www.yelp.com/biz_photos/mueller-lake-park-austin?select=P9FhEQhKNzEDn-CLnHNOfQ#a0z8MHAqkOxS59wF51Gp5g
It is the size of a regular chicken egg--grade A not jumbo. It's definitely not a muscovy...