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Photo#431725
Eastern Tiger Swallowtail Caterpillar - Papilio glaucus

Eastern Tiger Swallowtail Caterpillar - Papilio glaucus
Blainville, Quebec, Canada
July 21, 2010

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Eastern Tiger Swallowtail Caterpillar - Papilio glaucus Eastern Tiger Swallowtail Caterpillar - Papilio glaucus Eastern Tiger Swallowtail Caterpillar - Papilio glaucus

Why not Canadian Swallowtail?
The Butterflies of Canada site says the Eastern Tiger "reaches into Canada only in southern Ontario..." (so its presence in Quebec would represent a new range extension) whereas the Canadian Swallowtail is common to abundant in all provinces.

See CBIF.

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