Fantastic Mr Fox (Vulpes vulpes) Did you know… Foxes, like most mammals, have dichromatic colour vision. This differs from humans, who have trichromatic colour vision. What does this mean? This means that foxes lack the ability to distinguish red from green. So, to another fox, a fox’s fur appears brownish-yellow rather than the gorgeous red-orange that we see! The red fox is a crepuscular species, most active at dawn and dusk. Colour vision is, therefore, not so important in the first and last