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They are mostly a southern butterfly - it's the first time I've seen one here - maybe the first time I've seen one anywhere in the northeast, much less Rhode Island.
I wonder if climate change is pushing them northward.
My butterfly field guide lists the larval foodplants as citrus, torchwood and hoptree, but I wonder if she'll find some exotic northern leaf to lay her eggs upon.
The caterpillars are meant to look like bird droppings . . .
I'll keep an eye on the rue, since apparently that will do for them as well.