Mystery of mass animal death epidemic deepens after 8,000 turtle doves fall dead in Italy with strange blue stain on their beaks.

Thousands of dead turtle doves rained down on roofs and cars in an Italian town in the latest in a growing spate of mass animal deaths across the globe.

Residents in Faenza described the birds falling to the ground like 'little Christmas balls' with strange blue stains on their beaks.

Initial tests on up to 8,000 of the doves indicated that the blue stain could have been caused by poisoning or hypoxia

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