During an experiment in a zoo in Finland, animals were given a choice of triggering audio or video on demand.
Researchers say monkeys may prefer music to movies.
During an experiment in a zoo in Finland, they gave the animals a choice of triggering audio or video on demand.
It seems they liked listening to sounds more.
On offer was rain, music, and traffic noise, or footage of worms, underwater scenes, and abstract shapes and colours.
The study was led by Dr Ilyena Hirskyj-Douglas from the University of Glasgow.