The recent hot days here in SC have spurred the caterpillars to fast growth. This is normal and I’ve been amazed.
Today two caterpillars left the milkweed leaves and began travelling up to the screen top. When caterpillars are ready to pupate or go into the chrysalis stage, they will crawl to the top of their cage and form a silken knot. They hang from their feet like an aerialist without a net. Then they form a “J” and begin twisting until they shed off their last skin. This is the end of their time as a caterpillar!