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Name: Mine canary
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An allusion to caged canaries (birds) that miners would carry down into the mine tunnels with them. If dangerous gases such as carbon monoxide collected in. Mining foreman R. Thornburg shows a small cage with a canary used for testing carbon monoxide gas in (George McCaa, U.S. Bureau of. A domestic canary, of the type historically used to detect gas in coal mines. Sentinel species are organisms, often animals, used to detect risks to humans by providing.
The domestic canary, often simply known as the canary is a domesticated form of the wild The phrase "canary in a coal mine" is frequently used to refer to a person or thing which serves as an early warning of a coming crisis.
By analogy, the. Beginning in , miners in Great Britain carried a canary in a cage with them down into the mines. Why? Carbon monoxide can build to deadly levels, and it. Definition of canary in a coal mine in the Idioms Dictionary. canary in a coal mine phrase. What does canary in a coal mine expression mean?
Definitions by the. A canary in a coal mine is an advanced warning of some danger. The metaphor originates from the times when miners used to carry caged. A canary in a coal mine is an early indicator of imminent danger. Due to their small size, along with their ability to fly up into hard-to-reach spaces.
The "canary-in-a-coal-mine" figure of speech, referring to early warnings of problems, has turned into a cliché.
Mining foreman R. Thornburg shows a small cage with a canary used for testing carbon monoxide gas in (George McCaa, U.S. Bureau of.