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Psaltoda moerens : ウィキペディア英語版 | Psaltoda moerens
''Psaltoda moerens'', commonly known as the redeye, is an Australian species of cicada. It is distributed through the south-east of Australia, from southern Queensland to South Australia, as well as Tasmania.〔(Wildlife of Sydney - Fact File - Red Eye )〕 Populations can vary greatly between years; one year they may be present in large numbers and the next they may be entirely absent.〔 They feed primarily on eucalyptus but also on ''Angophora'' trees. As they feed on tree sap they expel small droplets of clear waste fluid. When numbers are high, this can form a constant stream.〔 ==Taxonomy== The redeye was originally described by German naturalist Ernst Friedrich Germar in 1834 as ''Cicada moerens'', and later transferred to the new genus ''Psaltoda'', where it was designated the type species by Swedish entomologist Carl Stål. Walter Wilson Froggatt reported that the common name was used by Sydney children in his 1907 work ''Australian Insects'', referring to the colour of the ocelli.
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