Diphlebia nymphoides

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Arrowhead rockmaster, Diphlebia nymphoides, is a large damselfly native to eastern Australia. It belongs to the family Lestoideidae and lives along streams and rivers. The IUCN lists it as Least Concern. Males are bright blue with a black-and-blue striped tail, while females are more muted. Adults perch with their lightly tinted wings spread out.