词条 | secretary bird |
释义 | secretary bird bird ![]() Snakes are the main food of secretary birds, a diet supplemented by lizards, grasshoppers, mice, and birds' eggs. Secretary birds hunt on foot, in pairs or small groups that keep in contact by hooting. They kill snakes by stamping or flailing them against the ground, sometimes dropping them from aloft. Secretary birds are protected in most African nations and are sometimes tamed around farms as snake-catchers, but they have nevertheless become uncommon. The nest is large, usually built of sticks in a thorn tree. The offspring, usually two, hatch in seven weeks and are fed by both parents by regurgitation. |
随便看 |
|
百科全书收录100133条中英文百科知识,基本涵盖了大多数领域的百科知识,是一部内容开放、自由的电子版百科全书。