During the day most bats roost in large groups in caves or hollow trees, hanging upside- down by their clawed hind feet. A bat's leathery wings are actually flexible flaps of skin stretched between incredibly long fingers. At night, bats hunt for food. Powerful springs in the two rear legs can compress and release to throw the robot into the air. Mini-computers around the robot's body gather sensory information.
Grasshoppers hop and fly.
When powerful rear-leg muscles launch it skyward, the grasshopper can unfurl its two pairs of wings and fly away. Instead of a brain and nervous system, a grasshopper has bundles of nerves called ganglia throughout its body. The robot giant squid enters a structure resembling a shipwreck on the ocean floor. Visitors can hear ambient underwater sounds. The robot uses a multidirectional nozzle to jet-propel itself and to expel water, waste, ink, and eggs.