Children are catching dragonflies. How should I persuade them not to catch dragonflies?

Children, do you know what dragonflies eat? Let me tell you, dragonflies help us eat mosquitoes. If you bring all the dragonflies home and kill them, there will be more mosquitoes and we will be bitten by mosquitoes. Aren’t dragonflies pretty? Their mothers love them. If we bring it home and their mother can't find them, their mother will be sad. You also have a mother. If you don't go home, your mother will also be worried about you, right? So we can’t catch dragonflies, and everyone says that’s not a good idea?