恭喜哦!!! 想请教牛牛几个问题: 研究鸟类的尾巴动作 通常认为不同的动作具有特定的意义 但是鸟在驱赶飞虫的时候也会摆动尾巴 用某种白鸟举例 ,有一种解释是说是为了alert那些predator,但是又用事实推翻了,最后一种解释说,是为了ambush,说predator在攻击之前,会仔细观察,然后挑一个弱白鸟来攻击,后面说这种动作是一个cue,(这里记不清了) Q1:主旨: A.support a hyph that tail wagging has some advantag of some specific species of birds. B.提供support说明 tail wagging is crucial to the bird's survial. 我就在这两个之间犹豫了,最后选的后者 (请问牛牛我去翻了一下原文,觉得摇尾巴的确是他们生存的关键,因为摇尾巴可以趋赶敌人,请牛牛确认一下,是不是B) Q2:同意以下哪个观点?选项都是关于鸟什么时候摆尾巴的,有~%……—¥* 忘记了,因为我可能选错了就不乱说了 (这个牛牛记得吗?) Q3:Weaken the claim that the prefdator ambush 是为了什么什么的 总之文章考点在这个ambush部分,由于看得快或者可能没完全看懂,所以我估计我的答案不太对,但我只记得我最后斟酌时的几个选项了,大家到时好好看就是了,不长。 (基本上这题我题目也看不懂,望牛牛回想一下)
Furthermore, wagging was not restricted to situations in which the wagtail had seen a predator and needed to inform it that it had been seen or that the bird was vigilant or able to escape because it occurred almost continuously during preening and feeding. In addition, during the videotaping no approach of a raptor(猛兽类) was recorded. As wagging does not seem to be restricted to direct encounters between wagtails and predators, it may be directed to predators that ambush their prey. Predators may make absolute judgements about the level of vigilance in a group of prey or compare vigilance levels between individuals, and then approach and attack the less vigilant prey. However, opportunistic predators such as sparrowhawks(雀鹰) do not prefer to attack nonvigilant rather than vigilant prey. Cresswell et al. (2003) suggested that if predators show preferences, they might do so on the basis of cues more complex than posture alone. Wagging could be such a cue and might be a better long-distance signal than body posture to a possible predator. To investigate this possibility, it would be worth widening the choice experiments presented by Go¨tmark & Unger (1994) and Cresswell et al. (2003) [转贴] |