U.S. Customs and Border Protection specialists said in a statement Friday that they seized the bird upon the flight's arrival at Los Angeles International Airport on May 27.
A flight attendant had captured the bird and handed it over to customs agents who put the bird in a cage and gave it seeds and water.
After screening and X-raying all passengers, crew and carry-on bags, no other birds, droppings or feathers were found.
Customs officials say smuggled animals can carry diseases, such as avian flu, which is potentially fatal.
