Mass poisoning suspected as hundreds of birds fall from trees in Australia

Corellas belong to the cockatoo family and are native to Australia - (Getty Images)

Hundreds of corellas have been discovered either dead or in a critical state in New South Wales, Australia, in what is suspected to be a mass poisoning.

Dozens of distressed birds were seen falling out of trees on Monday, the New South Wales Environment Protection Authority said as they launched an investigation. The affected birds were in the Newcastle, Carrington and Hamilton areas.