Marabou stork was moved into the genus "Leptoptilos" and the ending was modified to "crumeniferus" and used by many authors until it was noted that the correct masculine ending to match the genus is "crumenifer". The marabou stork is a massive bird: large specimens are thought to reach a height of and a weight of . A wingspan of was accepted by Fisher and Peterson, who ranked the species as having the largest wing-spread of any living bird. Even higher measurements of up to have been reported, although no measurement over has been verified. It is often credited with the largest spread
IAE VUT Marabou to be operated safely in civil rôles and airspace. The Marabou is a mid-wing, pod-and-boom style, tandem two-seat aircraft with a pusher configuration single engine and a T-tail. The wings are trapezoidal and with 6° of dihedral outboard of a brief, constant chord centre section, terminating in winglets. They carry rod actuated ailerons and electrically powered Fowler flaps. The fin and unbalanced, tab-assisted rudder are swept and the tapered tailplane carries a single-piece tapered elevator. All manual controls are integrated in the UAV's own control drives. The outer wing panels and horizontal tail are metal structures; the wing centre section