As the flowers and warm weather have dissappeared, the butterflies have as well.
While these butterflies are now gone their caterpillars are finishing growing and looking for a place to make a chrysalis for the winter.
They are a basic green like many caterpillars, but they have special "eye" markings to use in defensive situations.
When danger approaches they pull their head back into their body, swelling the front part of their body, making it look like the scary picture below.
If that doesn't work the caterpillars have brightly colored orange scent organs they extrude from their head that emit a bad odor.
It's defenses seem to be working for this caterpillar so far.