Although these hardy creatures survive a 2,500 - mile [4,000 km] migration, only time will tell if they are able to survive the gradual loss of their wintering grounds.
Meskipun makhluk yang tahan banting ini sanggup mengadakan ruaya sejauh 4.000 kilometer, hanya waktulah yang akan memberi tahu kita apakah mereka sanggup menghadapi semakin menghilangnya habitat musim dingin mereka.