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660 Views 3 Replies Last post: Jul 15, 2013 6:22 AM by MikeHardman RSS
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Jul 14, 2013 3:33 PM

Big moth in my bedroom!

Yesterday I found this moth in my bedroom and it didn't look like a common moth to me. I think this is a Lunar Yellow Underwing (Noctua orbona). Can someone, please, help to identify it? Thank you beforehand!

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    Jul 14, 2013 4:31 PM (in response to Gardensafari)
    Re: Big moth in my bedroom!

    From the proportions and general apperaance, I think it is large yellow underwing, Noctua pronuba.

     

    Usefully, you have photographed it on a fly screen, which idirectly provides a scale.

    Please can you use that to determine the wingspan (twice the lenth of a forewing + the width of the thorax).

    To be N. orbona, it should be 45mm or less; to be N. pronuba, it should be 45mm or more.

    http://ukmoths.org.uk/show.php?id=663

    http://ukmoths.org.uk/show.php?id=2851

     

    (I'm assuming you are in the UK.)

     

    Mike

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        Jul 15, 2013 6:22 AM (in response to Gardensafari)
        Re: Big moth in my bedroom!

        Sorted, then; jolly good.

         

        Thanks for the extra photo. The abdomen doesn't help in ID, but the banding on the hind wings is, as you will have figured out, of some use (compare with broad bordered yellow underwing, for instance - http://ukmoths.org.uk/show.php?id=6025)

         

        Noctua pronuba is actually rather variable in its appearance. Have a look at the examples here

        http://www.lepiforum.de/lepiwiki.pl?Noctua_Pronuba

        Despite that, over the years, one can 'get one's eye in'.

        It is a question, consciously or subconsciously, of focussing on the more constant of the characters and paying little heed to the more variable ones (such as ground colour).

         

        Mike

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