The tree fern is a never ending spiral of new growth which displays the fibonacci sequence in nature. The fronds of these ancient trees can reach six metres in length and remind us of prehistoric times. Within the folds of these living fossils many different creatures appear from the shadows. The green eyed tree frog is a master of camouflage and can be found clinging to these ferns in the rainforest of northern Australia. edition: 1 /1.