What I am mention here is basic from my encounter and what photos that I captured.
Not all the UFOs are living things in the sky. ET’s mechanic’s craft do exist but only in small numbers. Many triangle, boomerang , tube, rectangle or disk shaped UFOs have living characteristics.
I only call larger size of sky life are monster or beast, I think they are not playing UFO role on our sky and they are taking 17% of my visitors in my 6 years encounters. 70% my visitor’s size are less than two meters, some as small as two centre metres. they may playing major part of UFOs . also there are many tiny living thing in space, their size is about one-two millimetres or less . I have no information about whether they play role with UFO.
I can not understand, if they were living in the universe first, but as they are made of different materials then how have those species evolved to living on our planet?