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Is this a Helena Gum moth or an Emperor Gum moth? Wingspan when relaxed is about 130mm.
Currently perched on the windowsill outside the marina office at Akuna Bay!
That's awesome, thank you! He's been preening himself outside my office window for a few hours now. I did a bit of researching to try and find out what he was, but I don't know enough about moths to work out if he's a Helena or an Emperor.
Beautiful find! I think O.helena because it lacks the little white triangle just behind the leading edge, between the front eyespot and base of wing, which O. eucalypti has.