How Do Spiders Survive the Winter?
WouterSpiders are cold-blooded invertebrates. They are capable of surviving temperatures as low as 23 degrees Fahrenheit. Although many spider species have developed adaptations to survive freezing weather, there are some that are unable to.
Many spiders survive the winter by hibernating, though they can also prepare for the season. Some species build web sacs on siding, roofing or high corners of buildings. Others hide in under snow or under tree bark. The wolf spider, for example, burrows underground to protect itself.
Some spiders produce an antifreeze compound in their blood to prevent their cells from freezing. These molecules are similar to the antifreeze used in car engines to keep the engine running in subzero temperatures.
Some spiders also prepare for the season by laying eggs in autumn. These egg sacs, usually the same size as the spider, are then buried in a web. Several hundred eggs are contained in each sac. Once hatched, the spiderlings grow into adults by summer.
Spiders can also survive the winter by creating an insulated shelter. Some species create webs in these sacs and then let the snow build up on the webs for extra insulation. Another method is to build silk pods on the ground or a surface to block the wind.
When the weather becomes warmer, some spiders emerge from their nests to begin hunting for food. Depending on the species, they may build a new web, or they may leave the original one to search for food in a warmer area.
