They are leaf insects that camouflage...
The seahorse looks like a seaweed. It is a way of camouflaging itself as it lives among the seaweeds.
The tree frog camouflages itself to its surroundings.
The moth camouflages itself to the colour of the dry leaves and tree bark.
Can you see the owls on the tree ?
They camouflage themselves to look like part of the tree.
The hare and the polar bear too camouflage themselves to the colour of their surroundings. The fur of the snowshoe hare turns white during winter and turns rusty brown during summer.