100 yellow-tailed black cockatoos make a great sight in Royal National Park

Nature photographer Greg Tannos wished he had a little longer with his subject matter when he was confronted by a great sight while bushwalking in Royal National Park this week.

"Sorry to say these are the best images I took when over 100 yellow-tailed black cockatoos flew into trees above me," Mr Tannos told the Leader.

"Unfortunately they noticed me scrambling to get clear shots and scared off within a couple of minutes."

Mr Tannos, of Alfords Point, posted the photos on his Find My Australia Facebook page.

The Australian Geographic website says, "The yellow-tailed black cockatoo, with its golden cheek patches and beautiful yellow tail feathers, is an Aussie favourite".

"Peculiarly, these birds are currently thriving in Sydney in places such as Centennial Park where there is an abundance of pine cones for them to feast on.

"Watching these cockatoos peel bark off trees to access bugs is quite the sight.

"Despite recent adaptations to urban life, their numbers are still falling due to land clearing for development."