Not having seen any red admiral butterflies at the FWG I was surprised to find this large caterpillar snugly wrapped in a stinging nettle leaf. It looks like it is about ready to pupate. I looked for more caterpillars, but couldn't find any. Normally, these are gregarious, that is, the larvae can be found in large numbers together. Nettle is the larval host plant which is why many knowledgeable butterfly gardeners grow this plant, which to others may seem a peculiar thing to grow!