The bird was discovered on the plane by a passenger on a May 26 flight to Los Angeles International Airport, the Los Angeles Times reported Friday.
What airline the bird was found on was not reported.
An airline employee put the bird in a bag and handed it over to customs officials when the plane landed at LAX. Customs then gave the bird to the U.S. Department of Agriculture.
Customs and Border Patrol specialists believe the bird was being smuggled into the country illegally and inspected passengers and luggage but didn't find any more birds.
No arrests were made, but officials said Friday the bird was the same species as others found previously at LAX.