Researchers completed a male fruit-fly brain and central-nervous-system map covering about 166,000 neurons

Teams including HHMI Janelia and Google Research released the first complete male fruit-fly central nervous system connectome, spanning the brain, optic lobes and ventral nerve cord, for comparison with the 2024 female map. A wiring diagram is not a behavioral answer, but it turns later experiments into more precise, shareable work.