Corellas and white cockatoos filling skies and sporting fields across Australia is not all bad news

Little corellas feed on turf, which is why large numbers can do considerable damage to sporting field surfaces. (Supplied: Peter Rowland)

Clouds of corellas are filling the skies across parts of Victoria, South Australia, and southern New South Wales, creating a cacophony of sound and more than a few headaches for farmers and councils.

They damage sporting grounds, strip seals and fittings from buildings, dig up crops, and generally make a nuisance of themselves.