Stare at these pictures for long enough and you might just spot some clever creatures playing the ultimate game of hide and seek.
This Satanic Leaf-tailed Gecko is barely visible against the leaves in the Andasibe-Mantadia National Park, Madagascar.
These amazing animals are true masters at blending effortlessly into their environment as a means of survival in the natural world.
This Satanic Leaf-tailed Gecko hides from predators in Andasibe-Mantadia National Park, Madagascar, or is it just a leaf?:
A Bat-faced Toad hides among dead leaves in Amacayacu National Park, Colombia:
It's nearly impossible to pick out this Lichen Spider at the Erawan National Park in Thailand:
From frogs to fish and bugs to birds, this collection of images shows the animal kingdom's outstanding camouflage ability.
Animals use two basic methods of concealment in a bid to hide from predators and catch prey.
These are general resemblance and special resemblance.
A Speckled Sanddab blends perfectly with the pebbled ocean floor:
This Sandhopper protects itself by covering red sand all over its body in the desert:
An Orchid Mantis sits inside a flower:
This Leaf Katydid looks like part of the forest floor in San Cipriano Reserve, Colombia:
Can you spot me? A snow leopard looks for prey in the Himalayas:
With general resemblance animals use colour to blend in with their background until they are almost invisible.
This method is commonly associated with chameleons but other creatures, including spiders and the Hymenopus Coronatus or Orchid Mantis, adopt this tactic when hiding and hunting.
Special resemblance sees creatures use a mixture of shape, colour, texture and behaviour to make them appear like something else in their habitat, such as a leaf or twig.
This Peppered Moth has found the perfect hiding place on a rock:
A Righteye Flounder camouflages himself on the ocean floor:
This Mossy Leaf-tailed Gecko is a master of disguise in Montagne dAmbre National Park, Madagascar:
A Katydid blends into foliage in Costa Rica:
The Great Potoo hides in a tree in Brazil as it searches for food: