Host plants:
Willow, Salix spp. (CBIF 2014)
Aspen and poplar, Populus spp. (CBIF 2014)
Additional host plants for the white admiral, subspecies arthemis:
Birch, Betula spp. (CBIF 2014)
Additional host plants for the red-spotted purple, subspecies astyanax:
Cherries, Prunus spp. (CBIF 2014)
Oaks, Quercus spp. (CBIF 2014)
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Butterfly gardening hereabouts Toronto. Volume II
Non-FictionVolume II of the series provides information about the butterflies and caterpillars.