
The underside of this owl
butterfly's wing blends in with woody textures and features a large eyespot to startle predators. (by Jeff Foot)
Flatfish are masters of camouflage (by fabiogis50)

Can you find the
crabs camouflaged against the beach sand? (by babyruthinmd)
Paradoxophyla palmata, a narrow-headed frog native to Madagascar. The frog’s brown and yellow coloring, as well as its rough texture, allow it to blend in with the mud and tree trunks in its environment

The
Indonesian Mimic Octopus has a unique ability to turn virtually any color or pattern. It is naturally brown and spotted but has been seen in every hue from ghost white, as shown above, to brilliant blue and fiery red or mysterious pink. (via DM)

A
Green frog emerging from the duckweeds in St Omer, France. (via DM)

This
tarantula hides perfectly next to the flower (by dcp)

This
sand flathead (Platycephalus bassensis) is almost perfectly camouflaged (by richard ling)

This
Malaysian Orchid Mantis has cleverly adapted to resemble the striking white orchids of the region. (via DM)

Leaf insects or walkingleaves from the family
Phylliidae are some of the best examples of leaf mimics. (by Sandilya Theuerkauf)

A
Flounder (by sarahpooletwat)

A
Locust mimicks a blade of grass in Burkina Faso. (via DM)

A
Grey Cicada hides on pine bark in France (via DM)

A
Rock Ptarmigan chick in its nest in Norway (via DM)
Merlet's Scorpionfish look like colourful coral around the shores of Lifou Loyalty Islands, New Caledonia (via DM)