Dan,

Do you know if there is some spread sheet that lists the minimum body
temperature required for flight by different insect species?

Larry Schwitters
Issaquah

On Dec 18, 2012, at 1:07 PM, Dan Logen wrote:

> Tweeters, and Crazy Dave
>
> I get tweeters in digest, so am a day late with this response.
>
> I am into my first winter photographing moths and trying to learn
> about them. So far I have found two species that typically emerge
> in the late fall or winter.
>
> We are seeing lots of Bruce Spanworm moths, Operophtera bruceata.
> They are sometimes called winter moths. See photo and information
> here:
>
> http://bugguide.net/node/view/725501
>
> Also a few Erannis vancouverensis, perhaps a half dozen or so. I
> saw two of these just yesterday. These are larger than the Bruce
> Spanworm.
>
> http://bugguide.net/node/view/727114
>
> Both of these moths are interesting in that only the male is capable
> of flight. The females are flightless, with vestigial or no wings.
> They hatch in the spring, pupate in the late spring, then spend the
> summer as a pupa, to emerge as adults in late fall or winter. What
> a strangely timed life cycle!
>
> I'm waiting to see if other winter moths show up, but so far just
> these two.
>
> Dan Logen
> Stanwood WA
> d.logen at frontier.com
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