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House sparrows have been found living deep underground in several coal mines in the UK. At Frickley Colliery in Yorkshire, two sparrows were first seen at the bottom of the skip shaft at a depth of 640 meters in 1975, and a third bird appeared the following year. In 1977, one of the pairs bred successfully, raising three chicks, though the chicks did not survive long after fledging. The sparrows were provided food and water by miners and appeared well-adapted to living in the constant, illuminated environme
- Author
- arsh.kul
- Language
- EN