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Help Identify Large Brown Moth

knowsdogs Jun 11, 2006 05:40 PM

I found a moth attached to a window last night. It is the hugest moth I’ve ever seen and I don’t think (or know) if it is a regular inhabitant of southwestern Canada. It is over 5 inches across when its wings are spread out.

Can anyone identify it for me as I know dogs, not moths.

I didn’t want to leave it on the window as it was a busy commercial area by day and I was worried that someone would kill it because to many people it would be gross because of it’s enormous size. I brought it home in a clear tote bag I had and then put it in a basket with big holes out on my balcony. It’s still there and in the shade. I also need to know what to feed it until I release it. I gave it some rotten fruit, cucumber and lemon balm leaves because I read on the internet that some moths eat that though they are very particular. I also put a little jar lid of water in there.

I just want to make sure it’s not a super rare find or something that a university or other science group should know about. Who can I contact locally (Vancouver BC) to help me identify it if it IS rare?

Knows Dogs
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Replies (4)

lele Jun 11, 2006 10:52 PM

it is the Antheraea polyphemus. It is the only one of the giant silk moths that flies (almost) everywhere in the states/NA.

They do not feed as adults and from your pics it is either a female that has laid or aborted its eggs or male. The very narrow antennae make me think it is female.

My suggestion is let it go. If it is a female, it needs to either lay its eggs of find a mate or become a bird's meal; if that has already happened then it becomes a meal for bird or bat. Don't feel bad about that aspect - since they do not feed,once their procreation contribution takes place they die. Such is life in the insect world

lele

lele Jun 11, 2006 10:54 PM

here is a site for you...
WLSS non-member

knowsdogs Jun 12, 2006 01:32 AM

Thank you very much, lele. I will let it go and continue its life. I live in British Columbia Canada (2 hrs. north of Seattle) and have lived in Canada all my life and am a nature buff, but never seen a moth even half this big.

lele Jun 12, 2006 11:24 AM

you are quite welcome! pretty impressive, huh?

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