In UV the all-yellow we humans see, is not at all present. The size and shape of the dark centre can in many instances be a key component in identifying species that are very similar morphologically.
Last updated on 24 January 2015
In UV the all-yellow we humans see, is not at all present. The size and shape of the dark centre can in many instances be a key component in identifying species that are very similar morphologically.
Last updated on 24 January 2015
