Scientists have conducted many experiments to ascertain which animals can see in colour - and made some surprising discoveries. Studies of colour-blind capuchin monkeys show they are able to catch more insects per hour than their non-colour-blind cousins. As one would expect with our nearest relatives, apes and most monkeys have good colour vision.
However, no animal can see far at the other end of the light spectrum - the infrared one - although snakes come close. They see by thermal vision, sensing out their victims through infrared detection of the heat generated by them.