While walking to the cafe at work the other day, I found this critter in a tree by the sidewalk. It’s the caterpillar of an eastern tiger swallowtail. (Below is a photo of the butterfly that was taken earlier this fall.)

The caterpillars of eastern tiger swallowtails are typically green but go through a brown phase before turning green. The “eyes” on the caterpillar are not really eyes, obviously, but markings to make it look intimidating.