If ducks lacked side holes on their beaks, they would struggle to filter food from water effectively. These side holes, known as nares, allow ducks to breathe while foraging underwater. Without them, their feeding efficiency would decline, potentially impacting their nutrition and overall survival. This adaptation is crucial for their lifestyle as dabbling and diving birds.
they have lungs
The Black Swedish duck would match that description, as would the Cayuga.
on its beak
Beak.
Bill.
Bill.
It has a duck like beak.
A beak or bill
beak
A BEAK :P A BEAK :P
If I knew which kind of duck you are speaking of I could better answer you question. As a waterfowl lover, I don't know of any ducks who's beak turns white naturally. I would call your vet ASAP.
they have a beak and feathers look at www.duckimages.com