Not sure how to title this question

[PaulX]

I'm no expert since the only ever drake I've kept past 2 months old was a pekin, but shouldn't the rouen drakes already have drake color at 4 months old? y'know, with green heads and white neck ring and all?

As for voice sexing, these are girls

And this is a boy

edit: just saw this

I have a couple pictures of them from about a month ago but they now look different, so maybe I'll get a new photo to post.

If you mean they now both look very different from what they was, I'm sorry, you very likely have drakes.

 

[jsdspif]

just to update this,when they look like they're having sex the same one isn't always on the bottom. I've been trying to get pictures good enough so the difference in the coloring of the bills is clear but haven't had any luck. They don't exactly want to pose for me. One bill is that solid dark olive green and the other bill is more like a 2 tone orange with a little bit of the olive green type coloring, other than that they pretty much look alike and I still can't figure out what one or both is quacking like.

 

[Miss Lydia]

Can you pick each one up separately and walk away from the other? That may give you your answer.

 

[PirateGirl]

If you follow @Miss Lydia 's suggestion you should at least be able to figure out if they both have the same voice or if they sound different from each other.

If you watch closely when they mate, usually the male with latch on with his penis and at the end he kinda falls off and you will actually be able to see the exposed penis. You will know beyond a shadow of a doubt if you see this.

4 months is about when they start hitting maturity. If there are eggs coming it may be soon. It could be another month yet though.

 

[jsdspif]

I can't pick them up except maybe catch them in a fishing net but it's a struggle to catch them and I think it gives each of us a heart attack. so I don't want to do that. I've been watching to see if I can see a "private part" sticking out and I haven't seen evidence of that. So I guess it's just wait some more. I mainly just wanted to update it. I'll update again if I get good photos or more info.