What does the expression canary in a coal mine mean?

Canary in the coal mine. Meaning. Someone/something that is an early warning of danger. Examples.

What does the term canary in the coal mine refer to?

Well into the 20th century, coal miners brought canaries into coal mines as an early-warning signal for toxic gases, primarily carbon monoxide. The birds, being more sensitive, would become sick before the miners, who would then have a chance to escape or put on protective respirators.

Do they still use canaries in coal mines?

It’s hard to believe that canaries were still used in coal mines in recent decades to detect harmful underground gases. On December 30, 1986, that was largely put to rest. More than 200 birds were phased out of service as modern carbon monoxide detectors were phased in.

What does you’re my canary mean?

n. someone acting as an informer or decoy for the police.

Who sings canary in a coal mine?

The Police

Why did they use canaries in mines?

On this day in 1986, a mining tradition dating back to 1911 ended: the use of canaries in coal mines to detect carbon monoxide and other toxic gases before they hurt humans. … If the animal became ill or died, that would give miners a warning to evacuate.

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What is the definition of canary?

1 : a Canary Islands usually sweet wine similar to Madeira. 2 : a lively 16th century court dance. 3 : a small finch (Serinus canarius synonym S. canaria) of the Canary Islands that is usually greenish to yellow and is kept as a cage bird and singer.

How many canaries died in coal mines?

Three Billion Canaries in the Coal Mine. What does it mean for us that birds are dying?

What does it mean to sing like a canary?

In English, if you sing like a canary, you are reporting on someone to high-level officials, like the police. Let’s say police officers question someone suspected of a crime.

Can Canaries survive in the wild?

This is not a wild bird and will NOT be able to survive outside as those who were raised in the wild can. NATIVE TO: The Canary Islands, off the northwest coast of Africa. traced back to Victorian era England and Germany, where many of these favorite species were developed.

What is a canary deployment?

A canary deployment, or canary release, is a deployment pattern that allows you to roll out new code/features to a subset of users as an initial test.

Where does canary in the coal mine come from?

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 the mine, the gases would kill the canary before killing the miners, thus providing a warning to exit the tunnels immediately.

Who swallowed the canary?

To appear smug and/or overly pleased with oneself to others, especially over something one has done, received, or accomplished. After her promotion, Janet spent the rest of the day looking like the cat that swallowed the canary.

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How do canaries breathe?

Why use a bird instead of, say, a mouse? It all had to do with the birds’ breathing anatomy: canaries get a dose of air when they inhale and when they exhale, thus a double dose of toxic gases. Thankfully, in 1986, more humane electronic warning devices replaced them.

Were canaries used in gold mines?

Miner’s canary

Later, canaries were found to be more sensitive and a more effective indicator as they showed more visible signs of distress. Their use in mining is documented from around 1900. The birds were sometimes kept in carriers which had small oxygen bottles attached to revive the birds.

Coal mine