Thanks for letting me know. I know they are not worms, I went to school too, but they look like worms. I can tell you the process of metamorphosis of a butterfly, and those caterpillars though they look beautiful they can be dangerous for any human being, who are more important than an insect. Some men love insects more than children, and I cut my tree and killed all the caterpillars in behalf of my children. God created man and other creatures and told man to lord over all creation, and if they represent a threat you can act against them. It doesn't mean that acting as I did that I don't respect all animals and insects and for me all nature is fascinating.
Difference between worms and caterpillars:
Caterpillars have strong legs in a segmented body. While worms lack them or have little prominent locomotor appendages.
I gave my opinion, I don't like anyone to line up my beliefs. I still admire caterpillars but they can be very dangerous, it is fascinating the way they defend themselves. Poor children go to the streets looking for food and they don't always have the same luck. My grandchildren are safe though I had to sacrify my tree. In behalf of your community I will abstain to publish in you community though I have fascinating insects in my sorrounding ecosystem.