Ducks Don't Drown

How come ducks don't drown when they dive down after fish, huh?
Signed Perplexed on Cortes

Dear Perplexed
Well, I'll tell you. In the first place, duck's nose holes are very small so they
can fly faster eh? Plus, the left wing lateral nostril segues neatly next to the
middle ciliated septum and drains into the lacriminimal nasapharnx which
juxtaposes the eustachian, commonly knows as a half pipe in the scouter
world. A scouter being, like, a bird. Then all this plugs up the minute the 
nostril senses doom. If it took too long to catch that fish, the duck would
indeed, be toast. And that would be another story.
Signed Addled-on-Cortes