Guano extraction. Men digging at the Great Heap - a huge 2,000,000 tonne heap of guano on the Chincha Islands, Peru. Guano is the excrement of birds o

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Guano extraction. Men digging at the Great Heap - a huge 2,000,000 tonne heap of guano on the Chincha Islands, Peru. Guano is the excrement of birds or cave-dwelling bats. It is a highly effective manure and fertiliser. The Chincha Islands were of interest for their extensive guano deposits, but the supplies were mostly exhausted by 1874. Photographed in 1865.

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Size: 3638px × 4813px
Photo credit: © Simon Stone / Alamy / Afripics
License: Licensed
Model Released: No

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