article_snippet.sent: Each scale is pigmented with melanins that give butterflies black and brown colouring, but eye-catching blues, greens, reds and iridescence are created by the microstructure of the scales, rather than pigments eye-catching blues, greens, reds and iridescence.
article_snippet.sent: Each scale of a butterfly is pigmented with melanins that give butterflies black and brown colouring, but eye-catching blues, greens, reds and iridescence (pictured) are created by the microstructure of the scales, rather than pigments.
article_snippet.sent: The brighter colours on some butterflies are created thanks to the scattering of light by the scales, such as these jagged examples, which are Papilio ulysees butterfly scales. 
article_snippet.sent: it's reflected many times and the combination of these reflections causes us to see the intense yellows and blues of many butterfly species .
article_snippet.sent: it's reflected many times and the combination of these reflections causes us to see the intense yellows and blues of many butterfly species.
article_snippet.sent: Some butterflies even reflect ultraviolet light, which is unable to be seen by humans.
article_snippet.sent: The ability of Monarch butterflies to detect ultraviolet light helps Monarch butterflies on Monarch butterflies annual migration from North America to Mexico, for example.