2. Very Hungry Caterpillar Facts Unlike in the book caterpillars in real life are mainly colored to help them hind and confuse their enemies. Some even have body parts that look like thorns to scare away birds. In the book it says that caterpillar spins a cocoon, but that is when a caterpillar becomes a moth. Caterpillars spin a chrysalis when it becomes a butterfly .
4. The Time it Takes The Caterpillar grows in the egg for about 4 days Caterpillars life before the chrysalis is about 2 weeks long Then it spins a chrysalis and is in there for about 10 days Then becomes a butterfly and lives from 2-6 weeks