1. The Budworm overwinters as a small larva in a silky hibernaculum (cocoon-like shelter) on the bark.

2. Temperate Butterworts (Pinguicula) Temperate Butterworts (Pinguicula) survive long, cold winters by dying down to small, cone shaped hibernacula

3. It is more likely that subterranean structural features are more important than above-ground features in providing appropriate hibernacula.