duck or chicken egg?

[leafyhill]

We got an egg today that is 3.1 ounces, and white. We have 2 pekin ducks that are about 4 or 5 months old, and 6 month old hens of various breeds. How can we tell what layed this monster of an egg!?

 

[Ardizzone7]

Do you have a pic of it? My pekin just started laying last week. Her eggs are the size of a large chicken egg but slightly off white/

 

[juliaaa]

I agree on the picture. Would be easier to figure out for everyone. Some chicken eggs can weigh that much, especially if they have just started to lay.