A worker Argentine ant, Linepithema humile, that has captured an adult parasitic wasp, Tamarixia radiata, that it will kill to protect nymphs of Asian citrus psyllid, Diaphorina citri, that secrete waxy white honeydew on which ants feed.

A worker Argentine ant that has captured an adult parasitic wasp that it will kill to protect nymphs of Asian citrus psyllid that secrete waxy white honeydew on which ants feed. Credit: Mike Lewis, UC Riverside Center for Invasive Species Research
Credit: Mike Lewis, UC Riverside Center for Invasive Species Research