question about dragonfly larvae

[Kenney]

You're so lucky to have a dragonfly nursery. They're such great insects, and beautiful too. I heard they eat more mosquitos than any other insect. I leave my back doughboy a bit dirty so they can grow in peace. We see them come back generation after generation to drink and leave their little ones. I'm always happy to see the shells they leave behind when they emerge. We need mosquito eaters..