Late Zebra Swallowtail in West Virginia USA

[Hilton, Rob]

A friend emailed me today, November 13, and said: 

"My son and I hiked to the top of North Fork Mountain in Hardy County
this past Saturday.  While we were up there (about 3800 feet) a Zebra
Swallowtail (Eurytides marcellus) flew by.  Isn't it rather late in the
year for them and isn't that almost too high for them?  Three of the
guides I referenced showed that Zebras weren't around past September.
Glasberg showed a very thin line into Oct., but nothing past that.  I
still wanted someone's opinion though who was familiar with the area."

Has anybody seen the species this late or that high?  I only know the
butterfly from the area around Washington, DC, which is not far above
sea level, where I normally see it in April/May and around July.  

I will forward him any responses.  

Thanks, 
Rob Hilton
rhilton at csa.com
Silver Spring, Maryland, USA

 
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