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

Kent

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Kent McFarland
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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