The fluffy seed head in upper center has been bound together with silk from the
Cattail Moth Caterpillar (Simyra insularis)
After gently pulling apart about 6 fluffy seed heads and finding only dead caterpillars and Cattail Bugs I found a live caterpillar that was very active in the warmth of out home. This caterpillar crawls across the fibers of the cattail seed fluff. The caterpillar was in a seed head that was about 75% intact and still very compact. I can only believe that the very low temperatures of the polar vortex were not survivable for caterpillars in the loosely structured fluffy seed heads.