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→Value to man: HTTP --> HTTPS #3, replaced: http://www.bbc.com → https://www.bbc.com
==Value to man==
==Value to man==
Turkey vultures, though widespread and considered harmless to humans, have once been viewed as pests; i.e. there was a belief that the birds killed livestock, although these animals were in fact already dead when the first birds arrived, the turkey vulture being incapable of killing an animal larger than a rat. This attitude has changed over the years, and the bird is actually being used by man for different purposes. Police departments have experimented with turkey vultures in order to find out if they can locate human corpses, with mixed results<ref>http://www.thenational.ae/news/world/europe/police-train-vultures-to-find-human-remains</ref><ref>http://www.bbc.com/news/world-europe-13956581</ref>. Oil companies have had better luck: by adding ethyl mercaptan (a chemical also found in carrion) to the oil in pipelines, they can utilize the birds to detect leaks in the pipelines<ref>http://www.popsci.com/gas-leaks-are-designed-to-attract-turkey-vultures</ref><ref>https://www.allaboutbirds.org/do-vultures-find-dead-animals-by-smell-or-by-tracking-predators-or-scavengers-on-the-ground/</ref>.
Turkey vultures, though widespread and considered harmless to humans, have once been viewed as pests; i.e. there was a belief that the birds killed livestock, although these animals were in fact already dead when the first birds arrived, the turkey vulture being incapable of killing an animal larger than a rat. This attitude has changed over the years, and the bird is actually being used by man for different purposes. Police departments have experimented with turkey vultures in order to find out if they can locate human corpses, with mixed results<ref>http://www.thenational.ae/news/world/europe/police-train-vultures-to-find-human-remains</ref><ref>https://www.bbc.com/news/world-europe-13956581</ref>. Oil companies have had better luck: by adding ethyl mercaptan (a chemical also found in carrion) to the oil in pipelines, they can utilize the birds to detect leaks in the pipelines<ref>http://www.popsci.com/gas-leaks-are-designed-to-attract-turkey-vultures</ref><ref>https://www.allaboutbirds.org/do-vultures-find-dead-animals-by-smell-or-by-tracking-predators-or-scavengers-on-the-ground/</ref>.
==References==
==References==