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The upper wings of the moth which Jacob held were undoubtedly marked with kidney-shaped spots of a fulvous hue. But there was no crescent upon the underwing.
A member of the genus Catocala, a nocturnal moth which usually has brightly coloured underwings.
2019, Stephen Debus, “Small Kites, Genus Elanus”, in Birds of Prey of Australia: A Field Guide, 3rd edition, Clayton South, Vic.: CSIRO Publishing, →ISBN, part II (Handbook), page 113:
The ‘white-tailed’ kites in the genus Elanus (‘kite’) are small, gull-like, grey-and-white hawks with black forewing patches and varying amounts of black on the underwings.