The headlight beetle (genus Pyrophorus) is a large, Neotropical click beetle famous for its remarkable bioluminescence. Native to the warm tropical and subtropical regions of the Americas, these are among the brightest glowing insects in the world, utilizing their light for both communication and defense. The beetle features two glowing spots on the top of its thorax (the iconic “headlights”) and an incredibly bright abdominal organ that is only visible when it spreads its wings to fly. Despite its firefly-like behavior, it does not belong to the fireflies, but to the click beetle family (Elateridae). I encountered this massive, 3–4 cm individual during a night photography excursion in Yasuní National Park, Ecuador.