If birds can maneuver continuously for over two months without landing, so can a machine. For me the question is can we both design the vehicle to have the corr

If birds can maneuver continuously for over two months without landing, so can a machine. For me the question is can we both design the vehicle to have the correct physical properties, and an intelligent-enough automated flight computer? I think the former will simply require a very very large wingspan made of the lightest strongest material we have [currently Carbyne, formerly Graphite, with the metal alternative being "New Magnesium"]. Once this is accomplished, we could potentially make air transportation [in certain routes] much cheaper. This would have benefits like eliminating the risk of ocean pollution when a large ship crashes/capsizes, faster transportation of goods, and at the same time not be limited in transportation cost by oil market prices. And such designs, if made practical, could possibly be transferred to new aerospace engineering where weight-to-strength are at a premium. Designing an intelligent flight computer that can account for air currents could also make flight less turbulent, and potentially improve our understanding and prediction of weather patterns.