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The first sparrowhawk of spring 春天第一只雀鹰 To obtain better access to warbler nests, cuckoosmimic raptors 为了更好地抢占莺的巢穴，杜鹃通常会模仿成猛禽的样子 THE resemblance between cuckoos and sparrowhawks has been a cause of comment sinceancient times. 杜鹃和雀鹰之间的相似性自古以来就是引发评论的原因。 As the photographs above show, the two birds are similar in size, shape and plumage, 正如上面的照片显示的两只鸟，它们在大小，形状和羽毛上都很相似， and both have a conspicuous pattern of bars on their breastsa pattern found on manyspecies of hawk, 二者的胸前都有突出的条纹许多鹰类都有这种类型的条纹， but not on the cuckoo s relatives. 但杜鹃的亲戚中却没有。 Until now, though, no one has thoughtto take that observation any further, and test whether the one is truly mimicking the other. 虽然现在还没有人对此进行更深入的观察，并证实杜鹃是否真的在模仿对方。 Cuckoos would have good reason to do so, 杜鹃有很好的理由去模仿鹰， since the warblers and other small birds in whose nests they lay their eggs areunderstandably frightened of hawks, | 
