春暮夏初 ,人们在树林中常常听到“布谷———布谷”的鸟叫。这种鸟叫布谷鸟。它的真名叫杜鹃 ,也叫子鹃、子规 ,是森林的忠实“卫士”。布谷鸟形态大体相似 ,只是叫声不同。如大杜鹃为两声一顿 ,间隔２秒钟左右 ;四声杜鹃是四声一顿 ,叫声很像“光棍好苦”或“护林防火” ,所 Spring and early summer early summer, people often hear in the woods, “cloth Valley --- cloth Valley” bird. This bird is cuckoo. Its real name is cuckoo, also known as sub-cuckoo, sub-regulation, is the faithful “guardian” of the forest. Cuckoo form generally similar, but different sounds. If the big cuckoo for two meal, about 2 seconds apart; four cuckoo meal is four, crying like “bachelor good bitter” or “forest fire prevention”