Common predators observed so far
-dragonflies (Odonata)
-robber flies (Asilidae)
-spiders (Araneae)
-fish
-praying mantis (Mantidae) - Prey being "shared" with Asilidae, unsure which insect captured prey. Independent of this case I have watched Mantidae take Odonata as prey. see: http://www.inaturalist.org/observations/3274066
-ants (Hymenoptera) - Unsure if ants seized and subdued prey while living, appropriated prey Asilidae discarded or any other number of possible options. see: http://www.inaturalist.org/observations/2953816