The sight of feral goats dancing on a malleefowl nest where eggs were laid by the threatened bird species shocked Fiona Gray, a regional landcare facilitator in South Australia, who is one of three winners of this year's PestSmart Feral Photo competition.

"To my shock, as I was going through the images, I see feral goats jumping 'and dancing' around right on top of the nest, where the malleefowl eggs were laid," said Ms Gray.

Fiona Gray's image of goats dancing on an endangered malleefowl nest. Credit:Fiona Gray

Held since 2011, the photo and video competition by the Centre for Invasive Species Solutions seeks to highlight the devastation caused by invasive plants and animals.

Another winning image by James Gummer of Western Australia shows a red deer destroying a paper bark tree, while Mandy Craig of NSW illustrated how the weedy vine known as cat's claw creeper was smothering native trees until they died.