male or female

[new2ducks]

My ducklings are about 6 weeks old now and ventured out of their kennel today so I was able to get decent pictures of them. I can't tell the 2 apart right now but I would love to know if we at least have 1 male and 1 female...can I get some opinions? thanks

 

[Amiga]

At this age I would listen for quacking or quiet whasping. The first sound would be female (kinda loud), the second sound would be male.