人的嘴巴大同小异,但鸟的嘴巴却各有千秋。能玩杂技的巨嘴:在南美洲,有一种巨嘴鸟,它有一个色彩艳丽的大嘴巴,长30厘米左右,有身长的三分之一还多。别看它的嘴好像很笨重,其实只有30克左右,又轻又结实。有了这个嘴巴,树枝上的各种果子可就跑不掉了。这个巨大的嘴还能玩杂技呢!它把果实抛向空中,一扬头,就不见了。原来果实被它弄到喉咙里的嗉囊里去了,简直就像玩了一连串的杂技动作。 People's mouths are similar, but their mouths are different. Giant beak to play acrobatics: In South America, there is a kind of Toucan, it has a colorful mouth, about 30 centimeters long, with more than one-third longer. Do not look like it's mouth seems very heavy, in fact, only about 30 grams, light and strong. With this mouth, all kinds of fruit on the branches can not run away. This huge mouth can play acrobatics too! It throws the fruit into the air, and when it's a head, it disappears. The original fruit was it got into the throat in the bag, just like playing a series of acrobatics.