Rainbow bee-eater Rainbow bee-eater The rainbow bee-eater ("Merops ornatus") is a near passerine bird in the bee-eater family Meropidae. It is the only species of Meropidae found in Australia. Rainbow bee-eaters are brilliantly coloured birds that grow to be 19–24 cm (max 28 cm) in length, including the elongated tail feathers. The upper back and wings are green in colour, and the lower back and under-tail coverts are bright blue. The undersides of the wings and primary flight feathers are red and tipped with black, and the tail is black to deep violet. The rainbow bee-eater's two central tail feathers are longer
Rainbow inside a primary rainbow is brighter than the sky outside of the bow. This is because each raindrop is a sphere and it scatters light over an entire circular disc in the sky. The radius of the disc depends on the wavelength of light, with red light being scattered over a larger angle than blue light. Over most of the disc, scattered light at all wavelengths overlaps, resulting in white light which brightens the sky. At the edge, the wavelength dependence of the scattering gives rise to the rainbow. Light of primary rainbow arc is 96% polarised tangential to the