Last year September, I discovered a stinging nettle place near a small road were I found five empty chryslises of the Comma Butterfly. Since april this year I almost inspected these nettles (six to eight stalks) weekly.
Last Friday I was there again with Wanda when I noticed that some leaves had eating marks. When I looked closer I saw a fat caterpillar of the Red Admiral. I inspected all the stalks and found three caterpillars of the Red Admiral and SIX caterpillars of the Comma Butterfly...some of them were eating together on one stalk. The caterpillars all had different stages and one looked more like an albino so I guess six females of the Comma Butterfly passed this spot and found it perfect for their offspring.
Since my own garden experience in 1999 (see metamorphosises) it was the first time that I found that much caterpillars together again!