Initial testing of the stains is believed to be a sign of poisoning or hypoxia — lack of oxygen that is a sign of altitude sickness. Hypoxia is known to cause confusion and illness in animals. Experts said full test results may not be available for at least a week.
Thousands of dead turtle doves littered roofs and cars in the Italian town of Faenza in what has become part of a mass animal death epidemic that is spanning the globe. Residents of the town described the birds falling to the ground like ‘little Christmas balls’ with strange blue stains on their beaks.
“We have no idea why this happened all of a sudden. The doves just started falling one-by-one then in groups of 10s and 20s,” one witness told Examiner.com."