Predatory and scavenging behaviour of Microvelia macgregori (Hemiptera: Veliidae), a water‐surface bug from New Zealand

Microvelia macgregori (Hemiptera, Gerromorpha, Veliidae), a common water‐surface insect in New Zealand, often lives in aggregations and feeds communally by predation and scavenging. Prey‐location, prey‐capture, feeding, and group‐member interactions are examined. Experimental investigation of prey‐location cues indicate that vibratory cues from both the struggling prey and from conspecifics are important. Optical cues are also used, but there is no evidence that chemical cues have a role. Findings are considered in relation to other studies on gerromorphans.