Some animals see the world in shades of grey, while others perceive limited colours. Here are 10 animals that are colourblind ...

Many animals have evolved striking red hues ... is one of the most recognizable birds in the world, with its vibrant red, yellow, and blue plumage. Native to the rainforests of Central and ...

This iconic snake, with its bulbous head and red, yellow, and black bands, is famous as much for its potent venom as for the many rhymes—"Red and yellow, kill a fellow; red and black ...

When disturbed, they flash their bulging red eyes and reveal their huge, webbed orange feet and bright blue-and-yellow flanks ... Many of the animals that eat red-eyed tree frogs are nocturnal ...