They don’t exactly build the cocoon. Caterpillars periodically shed their outer skin layer, and the “cocoon” is just one of those layers. Turning into soup is also quite inaccurate. This video explains the process pretty well: https://www.youtube.com/watch?v=4RaCURU6A2o
Basically, its like everyday you change into the same somewhat similar shirt and then one day you went to change shirt and suddenly the shirt is not the same shirt but more fabulous shirt then before ?
They don’t exactly build the cocoon. Caterpillars periodically shed their outer skin layer, and the “cocoon” is just one of those layers. Turning into soup is also quite inaccurate. This video explains the process pretty well: https://www.youtube.com/watch?v=4RaCURU6A2o
Basically, its like everyday you change into the same somewhat similar shirt and then one day you went to change shirt and suddenly the shirt is not the same shirt but more fabulous shirt then before ?