Does anyone know what this sound means for ducks?

[Ben10]

 

[Ben10]

He’s done this twice in the past few days, I’ve never heard it before and I’m beginning to worry.

 

[Magnolia Ducks]

Perfectly normal, maybe a drake as they whistle before they rasp

 

[EvaRay1525]

I am not a expert but I think its normal? I have a duckling that was doing the same thing yesterday and its fine.

 

[DukesDucks]

OMG I'm going to have to keep playing that video. My poor dog is trying to figure out what is hiding in my computer.

 

[Magnolia Ducks]

I'm sure he's tilting his head sideways. My dog always does that when I ask her a question.