Roberts G
Department of Psychology, University of Newcastle
Anim Behav. 1997 Dec;54(6):1517-22. doi: 10.1006/anbe.1997.0544.
Flights from foraging flocks of sanderlings, Calidris alba were observed at Redcar, northeast England, in order to investigate how individual decisions to fly related to the behaviour of other flock members. Flights of sanderlings tended to be either of all birds in the flock on the ground, or of single birds or groups representing only a small proportion of the foraging flock. The latter accounted for the majority of movement events but after weighting by flock size the former accounted for the majority of bird movements. As flock size increased, the number of birds that flew without the whole flock taking flight increased. Thus, as flock size increased, it took more individual departures before the whole flock took flight. When flocks were disturbed by people or dogs, they were more cohesive, with more departures being of whole flocks.Copyright 1997 The Association for the Study of Animal BehaviourCopyright 1997The Association for the Study of Animal Behaviour.
为了研究个体飞行决策与其他鸟群成员行为之间的关系，在英格兰东北部的雷德卡观察了从觅食的三趾滨鹬（Calidris alba）鸟群中飞起的情况。三趾滨鹬的飞行往往要么是整群鸟都在地面起飞，要么是单只鸟或仅占觅食鸟群一小部分的群体起飞。后者占移动事件的大多数，但按鸟群大小加权后，前者占鸟类移动的大多数。随着鸟群规模的增加，未等整群起飞就飞走的鸟的数量增加。因此，随着鸟群规模的增加，整群起飞前需要更多的个体离开。当鸟群受到人和狗的干扰时，它们更具凝聚力，整群起飞的情况更多。版权所有1997动物行为研究协会版权所有1997动物行为研究协会。
