Inspired by a new Matariki exhibition, science commentator Cushla McGoverin looks at the prevalence of bioluminescence in New Zealand, as well as three recent studies into how it can be used in nature by creatures like fireflies and spiders, as well as by scientists trying to track infection of the H5N1 influenza virus. Cushla McGoverin is currently a research fellow within the Department of Physics at the University of Auckland, and Principal Investigator in Te Whai Ao - Dodd-Walls Centre for Photonic and Quantum Technologies.