Can you tell if your duckling is male or female by the color of the beak?

[Superblonde]

I have two 3-week-old ducklings, I have never raised ducklings before and was wondering if you could tell if they were male or female based on the color of their beaks. I think that one is male and the other is female because the one is slightly smaller, has a lighter bill that is brown on top and yellow on the sides, and the face is more brown than the other. The one I think is female has a more yellow face and a browner bill, she's larger, and a lot louder and loves to talk.

Also, I was wondering if anyone had any advice on raising ducklings. I bought a chicken coop that says it fits 2-4 chickens and I plan on putting up fencing around the coop so they can have some more running room, but for now I only take them out when it's warmer and bring them back inside with a heat lamp. I have a kiddie pool with a slide so they can get in and out on their own, that the ducklings love. I clean their food bowl and water drinker twice a day and clean the bin I keep them in every other day, because they are very, very messy duckies! They love mealworms and papaya as treats. Is there anything else I need or should do for the ducklings?
This picture is from when they were about a week old.

 

[MIster Ducker]

How old are they? At the age that they are at, you cannot tell how old they are, not until their real feathers come in

 

[Superblonde]

Their three weeks. They started getting their feathers around their wings, but I know that the feathers on both sexes will look brown until they are a little older.

 

[DucksnDaffodils]

There is only one breed that I know of that you can tell the sex by beak color at hatch. And that is Welsh Harlequin ducklings. Yours look to be Mallard/Rouen? The earliest way to tell gender is by voice somewhere between 3-6 weeks. Otherwise you have to wait til they get their adult feathers/drake tail, which could be somewhere around 5 months.

 

[MIster Ducker]

You also want to make sure they cant get out of the coop when there older. Mine escaped at night and wouldve been killed by a racoon if i didnt have a 22 handy. When they get quite big enough tho it wont be a problem. If there are not the right ratio from drakes to females on some breeds it can cause chaos. How old do you plan for them to be out of the brooder fully?Other than that it looks like your off to a great start! If you ever have and problems you can private message me. I have lots of experience with ducks and im sure many others do too

 

[Superblonde]

Thank you. I was going to wait until they got their full feathers, but I plan on moving them into our shed with a baby play pin so they have more space and they are still inside with heat until that time comes.

 

[Marcywisdom]

You also want to make sure they cant get out of the coop when there older. Mine escaped at night and wouldve been killed by a racoon if i didnt have a 22 handy. When they get quite big enough tho it wont be a problem. If there are not the right ratio from drakes to females on some breeds it can cause chaos. How old do you plan for them to be out of the brooder fully?Other than that it looks like your off to a great start! If you ever have and problems you can private message me. I have lots of experience with ducks and im sure many others do too