Here is one of them ( please see the attached pictures). There are about 10 flying in 5 groups, so two in each group. Sometimes, one followed another and sometimes they were split apart, but most the time they flew in parallel formation. They may show many shapes (or shape shift) in the photos, but this is just Aerodynamic Effects on non mechanic UFO. Their size about 20-30cm, flying speed could reach 5000 km/h. the first time I captured their photo was on 25 Oct 2005. Usually every few days they will pay a visit to my place.
reference article about the simple form life: http://ufo-spacelife.blogspot.com/2010/05/gas-giant-life.html