• Red on the inside of postmedian line = not cecropia moth, which is grey.
  • This white line is the postmedian line, or PM line for short.

Columbia Silk Moth

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This is Hyalophora columbia, the Columbia silk moth. Found in Burleigh County, North Dakota. It's similar to a cecropia moth, and is in the same genus, but based on color and pattern, this is definitely not a cecropia. See notes in photo for identification marks.

Cheryl Moorehead, NikonWitch, and 21 other people added this photo to their favorites.

  1. zxgirl 57 months ago | reply

    Fantastic great big moth! He's a beauty! Too bad his wing got nipped - I wonder if that was from a narrow escape?

  2. NikonWitch 57 months ago | reply

    I was wondering the same thing zxgirl.

    This is a fantastic shot!

  3. Aquila-chrysaetos 57 months ago | reply

    Looks like a Cecropia moth to me See www.butterfliesandmoths.org/species?l=3281 It is not purple enough to be a Columbian. See www.butterfliesandmoths.org/species?l=3282

  4. Arachnochap [deleted] 57 months ago | reply

    I am VERY impressed!

  5. Furryscaly 57 months ago | reply

    Make sure you're looking at the dorsal side of the wing, and not the ventral side, which is mostly what's visible in this shot. There is a lot of red on the inside of the postmedian line here. Cecropias are grey. I added notes. Also, your link displays a photo of Hyalophora columbia gloveri, the Glover's silk moth, a very purple subspecies, and is labeled as such in the photo. H. columbia is also red, but not quite as purple as H. columbia gloveri.

    So basically I know my moth is Hyalophora, and that it isn't H. cecropia. I know that it's also not H. euryalus, which has red both before and after the PM line. I know that it looks like H. columbia, but that it could potentially be some other Hyalophora, depending on what they look like and where they live.

  6. Mr & Mrs Apteryx australis 57 months ago | reply

    H. cecropia typically has red shading just beyond the outer border of the PM line. That feature is lacking here, making this Hyalophora columbia - Columbia Silkmoth.

  7. Furryscaly 57 months ago | reply

    Thanks, Kiwi. I just wasn't sure if there were maybe more species of Hyalophora here than I was aware of. The only two in that genus that I'm familiar with are cecropias and columbians, but I don't know how many are native here.

  8. Techuser 57 months ago | reply

    Whatever species it is, its a prettie!

  9. Maggi_94 57 months ago | reply

    Nice shot!
    Great colour!

  10. dame sol 56 months ago | reply

    Très bonne photo!

  11. Nexis 23 months ago | reply

    I got a shot of the same looking moth and thought it was a cecropia: bit.ly/Kn7179. I guess it's not.

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