Insects are increasingly used in neuroscience and behavioral research, raising welfare questions as evidence for insect pain capacity accumulates.
Insect welfare in research is an emerging ethical frontier. The traditional exclusion of insects from animal welfare regulations was based on assumed absence of pain experience. This assumption is increasingly challenged by evidence of nociceptive sensitization, avoidance learning and behavioral states that parallel pain responses in mammals. For high-volume research organisms like Drosophila, the scale matters: billions of fruit flies experience experimental procedures annually under minimal or no welfare considerations. Research institutions are beginning to voluntarily develop insect welfare protocols. The precautionary principle suggests that where sentience is plausible and welfare measures are available at reasonable cost, they should be implemented - particularly for species with stronger evidence like bees and cockroaches.