Immature birds have been recorded weighing as much as 16.1 kg (35 lb) during their first flights (at which time they may still have fat reserves that will be shed as they continue to fly).
Das aves inmaduras hai informes nos que pesan 16,1 kg durante os seus primeiros voos (momento no que poden aínda quedarlles reservas de graxa que irán perdendo a medida que continúen voando).