The larvae of dragonflies squirt water out their anuses to lunge forward after prey thanks to hydraulic linkages.

“Hydraulic linkages occur in a wide variety of biological systems…In addition, one can point to the predatory strike of dragonfly larvae, which lunge forward by squirting water out their anuses (Tanaka and Hisada 1980)…” (Vogel 2003:420-421)

Dragonfly Larva Hunts Newt

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In this video from Shape of Life a dragonfly larva stalks and catches a newt. Watch its water jet propelled lunge from 0:49 - 1:00. 

Last Updated August 18, 2016