Wings quiver all the time

[bluebird]

I recently picked up two 4 month old male ducklings. One is a mandarin and one is a call. The call ducks wings quiver (shake) all the time. Why is that?

 

[Mom 2em All]

I dont know the answer- but I wanted to tell you that mine do that too. I have ten ducks- and one of my female runner ducks do that whenever she is near the male duck. It may be a submissive gesture. Not sure.

 

[chikky]

My calls do that too. Not all the time, but off & on, like they're nervous or something. Curious to see if anyone knows why.

 

[bluebird]

Thank you! Just didn't know if it was a health/physical issue to be concerned about. The breeder thought it meant he was happy or content but having just brought them home and they were a bit stressed, was a little worried. Anybody else see this behavior with their ducks?