How do they do it?
Many birds have the ability to fly in tight flocks, mere centimetres apart, in perfect unison.
Large flocks of Red-rumped Parrots are about at the moment, gathering to feed on fallen seeds, stocking up to get through the depths of winter. These were seen feeding on a lucerne paddock near Picnic Point. If synchronised flying was an Olympic sport these guys would certainly make the finals!
Other birds of course prefer to go solo.