Found wandering on my dirt driveway on 4/6/2023. It accepted dandelion leaves. Orange spiracles.
Molted: 4/13/23
Purged: 4/21/23 so I gave it some dead beech leaves for cocoon purposes, which it confusingly began to consume.
Cocoon: 4/24/23 using some of its hair
Pupated: 4/27/23
Emerged: 5/16/23
Tawny virbia, maybe? Unfortunately I could not get any hindwing photos.

On Black Cherry (Prunus serotina). The Black Cherry Gall Azure Caterpillar mimics the Black Cherry Leaf Gall (Eriophyes cerasicrumena). The galls are home to small mites that feeds on the black cherry leaf. It turns out this caterpillar has a fondness for the galls - it eats the galls, mite and all. It’s one of only two caterpillars in our area known to be carnivorous. (The other is the caterpillar of the harvester butterfly.)

On northern highbush blueberry, Vaccinium corymbosum.

Here is another observation of the same species of caterpillar feeding on leaves of common witch-hazel, Hamamelis virginiana, a week later in the same location.

https://www.inaturalist.org/observations/193760846

Feeding on Common Witch-Hazel, Hamamelis virginiana.

Here is another observation of the same species of caterpillar feeding on highbush blueberry leaves a week earlier in the same location.

https://www.inaturalist.org/observations/182839110

Found 9/23/2022 on aster
Pre-molt: 9/28/2022
Molted: 9/29/2022
Wandered: 10/12/2022
I did not make note of when it pupated, so it may have been while I was traveling. I am waiting for it to emerge this season.
Update: Emerged 7/26/2023

Found 9/20/2022 on black cherry
Pre-molt: 9/21/2022
Molted: 9/22/2022
Pre-molt: 9/28/2022
Molted: 10/1/2022
Pre-molt: 10/7/2022
Molted: 10/10/2022
Unfortunately I had to release it on 10/21/2022 due to travel.

Found 9/18/2022 on aster (wood aster?).
It seemed to prefer eating the flowers and would ignore the leaves, which made keeping up with its appetite a bit difficult.
Wandered: 9/28/2022
It made a cocoon between paper towels so I am not sure exactly when it pupated. I am hoping that it emerges this season.

Found 9/10/2022 on white oak
Pre-molt: 9/14/2022
Molted: 9/15/2022
Pre-molt: 9/20/2022
Molted: 9/22/2022
Pre-molt: 9/30/2022
Molted: 10/3/2022
Wandered: 10/16/2022
Was fairly pink even before wandering. I am waiting for it to emerge this season.

Found 9/7/2022 on sweet birch
Wandered 9/15/2022 and pupated inside some leaves
Waiting for it to emerge this season
I found that this caterpillar was more likely to settle down on fresh food if I cut a notch out of the leaf that it could rest in.