SEABIRDS – THE CANARIES IN THE COAL MINE
June 21, 2019 Dyer Island Conservation Trust 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 canaries while at work; if there was any methane or carbon monoxide in the mine, the canary would die before the levels of the gas reached those hazardous to [...]