Johan Bäckman of Lund University, in Sweden, who used radar to track 225 birds, says that “even the most advanced planes, with very good navigational instruments would probably be unable to judge the wind drift like this. ”
وعلى نحو مثير للاهتمام ،‏ اظهرت بعض الدراسات ان هذه الطيور توقف نصف نشاط دماغها خلال الطيران في الليل .‏