Investigating Invisible Interactions: Electrostatic Charges in Insects and the Role of Elytra in Electrical Camouflage

Electrostatic interactions, the attraction or repulsion of differing charged entities, drive connectivity and functionality within the natural and technological world. Understanding and replicating these interactions will advance conservation, biotechnology and provide novel climate management strategies. All materials and organisms carry innate charges after exchanging electrons during friction, a process known as triboelectrification. Insects lose electrons during friction in flight, hence becoming positively charged. This electrostatic attraction between negatively charged flowers on the earth’s negative surface and positive insects facilitates pollen exchange. Our research measured innate charges of insects in picocoulombs (pC) using a ring charge sensor (RCS), a picoammeter and Faraday pail. Significant differences between charges of insect groups were observed (p < 0.001), frequently in the direction of beneficial interactions. Hoverflies tested positively and thus facilitate pollination via attraction to negatively charged plants. Ladybirds tested near neutral, and their elytra dispelled charge significantly faster than cardboard (p = 0.0283) and polyethylene (p = 0.0005). Therefore, elytra may camouflage charge accumulated from flight against potentially electroreceptive prey. This study addresses omissions in current research, often focused on bumblebees, pollination and aquatic environments, and our novel findings are a crucial step towards broadening the scope of electrostatic research and applications.