It’s all in your perspective, and maybe influenced by your specimen. The wide variations in nature are amazing.
I had searched for “Brown Butterfly” to identify this new to me butterfly and even used that to name my post. I didn’t find any matches.
It turns out it is identified using white as the primary color: the White Peacock Butterfly. If I had seen this second butterfly photographed later the same day first I might have searched differently. Or maybe not!
Online searches leads me to think these are Spicebush Swallowtail Caterpillars. The color (brown not green) and behavior (daytime eating not daytime sleeping) doesn’t exactly match what I’ve read and I’d be happy to have any input.
The false “eyespots,” presumed to scare off predators are correct for the Spicebush Swallowtail.
The caterpillar’s real eyes are pinpoint size and somewhere near the mouth.
These caterpillars could be known as “eating machines” which is how I happened to notice them as previously robust plants are now sticks.
I don’t know if these patio pots have enough acceptable foliage to support the five caterpillars I saw to their next stage. I’ll look for them again tomorrow.