Aphids can make their own carotenoids -- organic pigments that serve a variety of functions in animals, but until now, were believed to be produced only by bacteria, plants, and fungi. Pea aphids with ...

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Drag the slider to the left to see how an animal would see the same scene. Whereas human eyes contain three types of colour-detecting cells, called cones, dogs have just two. Their cone cells are ...

A study published in The Wilson Journal of Ornithology has identified fluorescent pigments in the feathers of Long-eared Owls—visible to humans only under ultraviolet (UV) light. Led by Emily ...