Sexing Two Muscovy ducklings?

[DuckQuilter]

Here are pictures of my two ducklings. Any ideas on what sex they are? They were both born on Feb 14th.

 

[chickboss]

No, sorry. However, is the one in the background larger? If so I would say boy to that one. But I really don't know. They are sooo pretty though!

 

[Bleenie]

Post some individual pictures of each one, make sure we can see the feet clearly in the pictures too, that will help us guess what sexes they are better.