The researchers found that the birds ’ heart rates dropped when in formation and that they beat their wings less frequently than when flying solo, even though their speed was similar.
Para peneliti mendapati bahwa detak jantung burung - burung tersebut berkurang sewaktu terbang dalam formasi dan mereka tidak terlalu sering mengepakkan sayap dibandingkan sewaktu terbang solo, meskipun kecepatannya sama.