Arthur Landsborough Thomson

Sir Arthur Landsborough Thomson (8 October 1890 – 9 June 1977) was a Scottish ornithologist.

He was president of the British Ornithologists' Union from 1948 to 1955. He was awarded in 1953 a knighthood, in 1957 the BTO's Bernard Tucker Medal, in 1959 the BOU's Godman-Salvin Medal, and in 1962 the Royal Society's Buchanan Medal. His father was the naturalist J. Arthur Thomson.