The Aspgest is a creature supposedly native to Earth. It has a cylindrical shape and flies through the air. Very little is known about these creatures. They tend to escape detection by the human eye, but are occassionaly seen in photographs and videos.
There may be different breeds, species and sexes of aspgests, but it is difficult to determine this at the time.
Their strange movements may indicate that they are merely slices of creatures that exist in extra-spatial dimensions (not to be confused with extra-universal dimensions that is namely other universes).