The Atlas moth (Attacus atlas). Atlas moths are considered to be the largest moths in the world in terms of total wing surface area (upwards of c. 400 square cm or 65 square inches). Their wingspans are also amongst the largest, from 25-30 cm (10-12 inches). Females are appreciably larger and heavier. However, the largest lepidopteran just in terms of wingspan is thought to be the White Witch moth, Thysania agrippina. A record specimen of Attacus atlas from Java measured 262 mm while Thysania are claimed to be about 270-280 mm or 11 inches. Based on some spread specimens and angle of wing, actual measurements of around 289 mm have been estimated.
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