The brown cornbill (Libellula fulva) is a true dragonfly (Anisoptera) in the cornbills (Libellulidae) family. The brown cornbill is a rather broadly built dragonfly, with a distinct dark spot at the base of the hind wings and a black stripe at the base of the forewings. The veins in the dark spots are conspicuously orange. The extreme tips of the wings have a faint but distinctive dark patch, especially obvious in females. In males, after hatching, the abdomen is orange, with a black dorsal stripe that widens towards the rear. However, hatched males look very different: all orange parts of head, thorax and abdomen turn black and the abdomen gets a light blue frosting on top. The tip of the abdomen remains dark. The eyes change colour from brown in young males to blue-grey in older males. The dark wing tips are sometimes not visible in uncoloured males. Males that are not yet very old (but already blue frosted) still have prominent orange forewing veins, giving the whole animal a very colourful appearance. Females are coloured like young males: mostly orange with a wedge-shaped black stripe on the back of the abdomen. Old females fade to dark brown and the eyes turn greyish. Very occasionally females with blue frosting occur, which closely resemble discoloured males. The body length of adults is between 42 and 45 millimetres.
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