Is this the start of a drake curl?

[DuckyVeit]

My Pekin does the whistley sound, the Black Swedish i think is turning more into a quack?

 

[DuckyVeit]

Any guesses?

 

[FunQuail]

I'm having trouble telling who's making which noise.

 

[RShayne]

Can't tell which one is making what noise but it sounds like 2 boys and 1 girl. I would wait until 6 or 7 weeks, pick them up one at a time and walk away from the others, they will let you know if they are drakes or hens.