Every autumn, Corvo Island in the Azores turns off its public lighting for a few key days to help fledgling Cory’s shearwaters as they attempt to fly to the ocean guided by the stars Once a year, Corvo, the smallest and most northerly island of Portugal’s Azores archipelago, goes dark. Since 201...

Source: [Guardian International](https://www.theguardian.com/environment/2026/oct/25/corvo-azores-corys-shearwaters-switch-off-saving-seabirds-aoe)

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