the birdman lucid is not a bird nor a man, but an experimental cloud of nanoparticles packed so tightly that they condense and become a nanoparticle liquid substrate which is then used as an exoskeletal suit that adapts and morphs depending on its pilothosts situational needs. it gradually drips off old, dead nanobots so must replenish its particlecount by breaking down its surroundings at a molecular level and absorbing them.
the prototype disappeared along with over 10 years of research material involving it and one other project dealing with soul flashing, or the act of downloading ones consciousness onto a drive or series of drives.
both missing projects were run by a single researcher, also currently missing.
i believe he had an affinity for birds.