Nikolaas 'Niko' Tinbergen (15 April 1907 – 21 December 1988) was a Dutch ethologist and ornithologist who shared the 1973 Nobel Prize in Physiology or Medicine with Karl von Frisch and Konrad Lorenz. Their discoveries were about individual and social behaviour patterns, and how they are triggered.

In the 1960s Niko collaborated on a series of wildlife movies, including The Riddle of the Rook (1972) and Signals for Survival (1969), which won the Italia prize in that year and the American blue ribbon in 1971.