Chicago, Aug 08, 2017: Ever wondered how birds carry multicolored feathers to show off? While some birds are bright in color as one can spot them remotely, some are colored and appear deceiving so much that you’ll never realize if you’re even looking at the bird!
There are more than 18,000 bird species on Earth, and every species is differently colored. The feathers of the birds are composed of intricate combinations of mottles, scales, bars, and spots, making each one unique and resembling different.
It has previously been discovered that different patterns and colors help camouflage the birds from predators.
A study on about 9000 bird species’ plumage coloration was conducted by Dr. Ismael Galvan and his team of expert researchers to answer the very question: How birds get such different colors?
Two types of pigments are responsible for the plumage coloration: melanins, which produce a range of black, gray, brown, and orange colors and carotenoids, which are used by specialized feather structures to generate brighter color shades.
Melanins are synthesized by in the birds’ bodies in special cells called “melanocytes,” which work together with feather follicles to achieve a fine control of coloration.
Carotenoids are present in certain food items that circulate through the bloodstream and to the feather follicles when birds consume such food items. The birds cannot produce carotenoids, nor can they exercise direct cellular control of synthesizing and depositing carotenoids. The specialized feather structures react to the consumed carotenoids with a mechanism that is not regulated by specialized cells.
Carotenoids are more commonly examined in the study of bird coloration, however, Dr. Galvan and group are the first to test whether melanins are indeed the only pigmentary element that birds’ bodies directly control on a cellular level.
Galvan says, “Knowing beforehand that different pigments and structures produce different types of colors in feathers, we examined the appearance of the plumage of all species of extant birds and determined if the color patches that they contain are produced by melanins or by other pigmentary elements.”
He further added, “We also identified those plumage patterns that can be considered complex, defining them as those formed by combinations of two or more discernible colors that occur more than two times uninterruptedly through the plumage”, reports ANI.
According to the researchers, 32% of the species examined have complex plumage patterns, with the large majority of these complex patterns produced by melanins rather than carotenoids.
To put simply, carotenoids produce color patches, whereas melanins produce intricate patterns
However, in exceptional cases, unusual colors appear to be produced by their bodies making metabolic alterations to the carotenoid colors that they consume. Some of these are Fruit doves, cotingas and one type of stork have complex plumage patterns without melanins.