Fireflies, disoriented by light at night, enter a house and are found dead in the morning, with some caught in spiderwebs and preyed upon by spiders in Tehatta, West Bengal, India, on June 9, 2025. Firefly populations are declining globally due to factors such as habitat loss, light pollution, pesticide use, and climate change. Urbanization destroys the moist, natural environments that firefly larvae require. Deforestation and wetland drainage eliminate critical habitats, particularly for species that depend on moist conditions. Light pollution from streetlights, vehicle lights, and commercial sources disrupts the bioluminescent communication fireflies use for mating, hindering reproduction. Climate change further impacts fireflies by altering temperature and precipitation patterns, affecting their larval development and breeding cycles.
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