James Duncan Robertson FRSE FIB FZS (16 January 1912 – 22 December 1993) was a 20th century Scottish zoologist.
He was born in Glasgow on 16 January 1912 the eldest of four children of James Robertson, a local headmaster of Shetland descent, and his wife Phemie Helen Hunter Muir, a schoolteacher.
He was a Robert Donaldson Scholar 1933 to 1935 during which period he befriended Alexander Haddow, Douglas Bertram and Russell Lumsden.
In the Second World War he saw active service in the RAMC, serving as a Captain in West Africa, Italy and India.
His proposers were Sir Maurice Yonge, Otto Lowenstein, Ebenezer Ford, Sheina Marshall and Andrew Picken Orr.