科学美国人60秒 SSS 2013-09-13（在线收听）

 A vacation always runs more smoothly when you plan ahead. And we humans aren't the only ones who make travel arrangements.A new study shows wild aramitans choose the direction of the trip in advance and then communicate their plans to others. The work is in the journal class one. Mature Melanbragatans made loud roars called long calls.Although more than a kilometer away,study suggests that the long calls can announce the caller's identity, attacting females while awarning off rival males. But do they transmit travel plans as well? To find out, researchers monitored 15 wild males while arresting a feedings the mamatans turned a different directions and produce a total of 200 long calls. But they eventually began to move intended to be in the direction they have based while vocalizing,additional long calls signal changes in direction. by planning and ensuring the itineraris, the males influcence their peers. Females tended to move towards the caller's path while subordinate males avoided it. For these apes, an empressive roar places a clear trail.