The Dark Glassy Tiger butterfly is a species of butterfly commonly found throughout Singapore. Here it can be seen resting on a Crotalaria retusa plant. As can be seen, the Dark Glassy butterfly has blue and black stripes on its wings. Male Dark Glassy butterflies have special scent scales on the hindwing probably used for mating. Males also extrude a pair of yellow hair pencils when alarmed. Tiger butterflies like the Dark Glassy are known to be particularly attracted to the Crotalaria retusa. Also seen in the picture are Crotalaria retusa seed pods. The seed pod the Dark Glassy Tiger butterfly is resting on seems to be at the final stages of changing from a yellow flower to a black seed pod.
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