对人类来说,义务植树造林是一件利在千秋的事。有趣的是,在动物世界里也有“义务造林”的模范呢!植树鸟生活在秘鲁的植树鸟,被当地人称为“卡西亚”。这是一种白脑袋、黑身子、形如乌鸦的鸟。它长着一张长嘴巴,行动灵活,并很有力气。这种鸟喜食甜叶柳的叶子。它吃甜叶柳的习性十分特殊,不是在树上直接啄食,而是折断树枝,将它插进泥土中,然后有滋有味地啄食树枝上的叶子。这样,插在地上的树枝一遇 For mankind, voluntary afforestation is an event of its own benefit. Interestingly, in the animal world, there is also a model of “voluntary afforestation”! Tree-Breeders Tree-breeders living in Peru are called “Cassia” by the locals. This is a white head, black body, shaped like a crow bird. It has a long mouth, flexible action, and very energetic. The bird is eating sweet leaf leaves. Instead of pecking directly in the tree, the habit of eating sweet leaf willow is to break the branch, insert it into the soil, and peck the leaves of the branch with its taste. In this way, stuck in the branches of the ground once