Insects may hibernate as adults or in an immature form such as a nymph, larva or pupa. Those in the pupa form generally cover themselves with some kind of insulating material, such as a cocoon. Still, others overwinter as adults right where they are. These hardy souls must find a protected spot. Hollow trees, logs, leaf piles, and the soil afford shelter from the cold.
Many insects also find manmade structures, such as houses and sheds, suitable.
Most people view all insects as pests that destroy crops or spread disease. In reality, less than 1 percent of insects are pests and less than 100 of these consistently pose problems. Most people don't appreciate just how valuable these creatures are. Researchers have just begun to understand the roles that insects play in controlling agricultural pests in fields or yards. Ecologically, insects are crucial to the existence of many other species.