An image of an Australian bird species in the wild is the latest brain-teaser to divide the internet.
At first glance, the photograph appears to show a silvery grey-coloured tree stump with a birds nest made of twigs nestled crook of the branch at the front.
However, on closer inspection there appears to be more than just a tree stump featured in the image.
There are actually birds sitting in the tree, completely camouflaged within their surroundings.
The two birds are tawny frogmouths - sit-and-wait hunters related to the nightjar family, a group of small, secretive nocturnal birds that catch flying insects on the wing.
According to the Australian Reptile Park, their silvery-grey plumage streaked with black and brown, mottled with flecks of rusty brown and white gives them the ability to blend in with their surroundings.
They can sit in full view on an old tree stump in broad daylight and be practically invisible.
The birds will often sit in pairs with their heads pointing towards the sky to appear as if they are a dead tree.
Their cover is only blown if they try to fly away or warn off predators by opening their bright yellow mouths.
Tawny frogmouths are native to Australia and found throughout the mainland and in Tasmania.