On August 12, 1883, the astronomer José Bonilla reported that he saw "more than 300 dark, unidentified objects crossing before the sun" while observing sunspot activity at Zacatecas Observatory in Mexico. He took a number of wet plate photographs at 1/100th of a second exposure. Although it was later found that the objects were actually high flying geese, Bonilla is usually given the distinction of having taken the earliest photo of an "unidentified flying object," with some UFOlogical literature interpreting the photographs as either alien spacecraft or unsolved mystery.
On May 13, 2004 Jaime Maussan released his interview of Mexican Air Force pilots showing an infrared video footage from a military air patrol on March 5, 2004 against drug smuggling, that shows at least 11 very hot "spheres" moving irregularly with apparent great speed. The objects could not be seen with the naked eye, neither the crew on board nor ground personal confirmed any radar contact with the objects in question. The crew did however pick up an earlier radar contact of an object moving at 60 mph which was later described as a lonely truck on the highway below which has been located to the front of the two engine Merlin C26A aircraft whereas the infrared targets were picked up through a dome mounted IR-system a little later at abt. -130° azimuth relative to the aircraft's flight direction in its 8 o'clock position. The lights have been explained as oil platform burn-off flares. Compare as well the analysis of Captain Alejandro Franz in July 2004