According to Harry Pavulaan determinations of VBS material, probably yes. The first Eastern is May 27 in SW VT. 


Kent McFarland
Vermont Center for Ecostudies
PO Box 420 | Norwich, Vermont 05055
802.649.1431 x2

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On Wed, May 22, 2013 at 2:09 PM, Roy Pilcher <[log in to unmask]> wrote:
Observed ~10 Tiger Swallowtails today in Brandon and Sudbury.  I attempted to net one for identification but was unsuccessful!
Can we assume at this date that they are all Canadians?
Cheers, Roy Pilcher