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It sounds incredible but it's true - over 30,000 flying foxes are believed to have been killed by heat stress - since 1994. It's just one close to the edge some species and eco-systems are. Flying foxes can't tolerate prolonged exposure to temperatures over 42 degrees - a small change in maximum temperatures or rainfall is the difference between life and death for many species. These ecological tipping points can be difficult to spot before they happen - but once reached can be hugely destructive.
