Different animals can see different kinds of colour from a broad range of spectrums. Some see very little colour, while creatures such as bees and butterflies see more than us as humans.
But what about our pets – which colours can they see?
The answer isn’t as simple as you’d think, because colour doesn’t actually exist. Colour is our brains’ way of processing light wavelengths.
Light hits our eyes and special cells (photoreceptor cone cells) turn it into nerve impulses which are then passed to the brain and processed into the various colours.
Human eyes also have more than 120 million rod cells that process low level light and the shape of objects, but not colour. This all makes it incredibly difficult to test whether our animals see in the same colours that we do.