Trevor James Constable (17 September 1925 − 31 March 2016) was an early UFO writer who believed that the UFO phenomenon was best explained by the presence of enormous amoeba-like animals inhabiting earth's atmosphere. A native of Wellington, New Zealand, he served 31 years at sea, 26 of them as a radio officer in the U.S. merchant marine. He authored several books on the aerial warfare of World War II, together with co-author Raymond Toliver. These works have been described as uncritical and not grounded in historical realities by several historians.