Subject: what is this?
Location: tucson, az
December 4, 2012 1:46 pm
found this caterpillar on my orange tree, what kind is it?
Signature: stephen

Orange Dog

Hi Stephen,
This is the caterpillar of the Giant Swallowtail and it is commonly called an Orange Dog.  Though they feed on the leaves of citrus, we doubt they will ever be plentiful enough to cause a problem.  The adult Giant Swallowtail is a beautiful butterfly.  It is native to eastern North America, but its range has expanded to the eastern states with the cultivation of citrus trees.  Citrus is not its native host plant, but it has easily adapted its preferences to be able to flourish with the cultivation of citrus.

Location: Arizona

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