7. Royal antelope
The royal antelope is the smallest antelope species, and are native to West Africa. You may think that the pictured specimen is a calf, but it is actually fully grown.
There are about 2,500 species of cicada in the world, all spending most of their lives underground as nymphs. Towards the end of its life, the nymph will burrow out of the ground and molt its skin, emerging as an adult winged cicada. Some species of cicada spend close to 17 years underground, emerging simultaneously to mate, and beginning a new 17-year cycle.