Medical students are taught - "When you hear the sound of hooves, think horses, not zebras." 'Horses' are common ailments, 'zebras' are rare diseases. is a zebra. The problem is that doctors have forgotten that zebras DO exist.
"Momonga" The Japanese dwarf flying squirrel; Nihon momonga) is a pygmy flying squirrel, beautiful large eyes and a flattened tail. It inhabits sub-alpine forests in Japan and is nocturnal, This cutie can leap from tree to tree using a gliding membrane.