Why are my caterpillars spinning silky webbing?Updated 9 months ago

It is a good sign if you see webbing in your cup of caterpillars.

In nature, the webbing protects the caterpillars from many dangers.  Caterpillars use the webbing to stick to their host plants, as the wind can easily blow them off the leaves.  Caterpillars also use the silk to pull leaves around themselves to hide from predators that might like to eat them!