Author Mark Essig was on his short flight from Charlotte, North Carolina, to Asheville when he spotted an unusual looking passenger walking down the aisle.
Essig was seated just behind Daniel, an emotional support duck who was accompanying his owner on the flight.
Daniel the duck also wore a Captain America diaper, which Essig says the owner told him was Daniel's favourite.
Daniel is four-years-old and was bought by his owner at a yard sale. Essig said his owner "kissed him on the beak several times" and held his beak gently when he quacked a lot during the flight.
Most captivating is this shot Essig managed to get of Daniel looking out the plane's window, something he said the duck did for a lot of the flight.
"His owner told me he couldn't fly, and Wikipedia tells me that Indian Runner ducks can't fly," said Essig. "But does his tiny brain contain some pre-domestication ancestral memory of flight?"