Deck-landing reconnaissance and Fleet gunnery spotting biplane, first flown in 1921. Twelve Bison Is built for the FAA in 1923. One converted to an Avro 555B amphibian with a central float. Main production during 1925-26 comprised 41 Bison IIs, each with the upper wing raised on struts above the fuselage and no dihedral. Operated from the aircraft carrier HMS Eagle in the Mediterranean, on board HMS Furious and at Hal Far, Malta.