I often encounter the easily recognized White-marked Tussock moth, Orgyia leucostigma. I found this one feeding on maple at the end of May in my front yard.
I grabbed it for some closeup shots and to attempt to rear it.
It must have been a final instar, because it pupated just five days later. It spun the cocoon at the top of a container, but I carefully removed it to take some photos.
A flightless female emerged ten days later.
Females cling to the cocoon until mated. That night, I carefully pinned the cocoon with her on it to a post on my deck. When I checked an hour later, mating was already in progress. The male that found her was rough looking, having lost many wing scales.
The next morning I checked on the cocoon. As expected, the female had laid an egg mass. I assume she fell to the ground as she was nowhere to be found.
The eggs overwinter, and I’m holding on to them. Hopeful I’ll get some photos of the early instars sometime next year.