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It means an early warning sign of possible danger. The phrase comes from the historic use of canaries to detect dangerous gases in mines.
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They use special pens, resistance exercise equipment, preserved/packaged foods and restrained sleeping compartments or sleeping bags.
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It mentions animals fleeing before the 2004 tsunami, alarm behaviour before the 1805 Naples quake, migratory birds avoiding storms and sharks/dolphins responding to pressure changes.
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He was the ‘Birdman of India’, an ornithologist who conducted systematic bird surveys and wrote books on birds.
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Use cardboard/chart paper or other safe reusable material. The aim is to support bird conservation; the design may vary.
