Description: Nymphs of this species form aggregations, and send "group" vibrational signals (through plant stems) that elicit anti-predator behavior from the caring female, including wing-fanning and leg-kicking. cool!. Date: 19 May 2008, 21:01. Source: Umbonia crassicornis (F Membracidae) Uploaded by Jacopo Werther. Author: Marshal Hedin from San Diego.
