the cocoon of pyrrharctia isabella, or the woolly bear caterpillar on a pile of dried leaves.

adhere allergy attach ball bear black brown bug canada caterpillar cocoon cryoprotectant dermatitis dried fall fluffy fur hair hairs hatch hibernate insect irritation isabella larvae leaves metamorphosis moth nature oblong pile plant predict pupate pyrrharctia round satae seasons shed silk spinning spiny spring states texture tiger transformation united weather wild winter woolly wooly