Wednesday, January 26, 2011

哺乳动物与幼儿 Mammals and their youngs

哺乳期中,母大熊猫会时刻把幼仔紧紧地搂在怀里或叼在口里,从不让它离开自己。出生25~30天,幼仔的体重可达1000克,毛也开始稠密,身体表面出现黑斑,就像一只小型的成年大熊猫。45~48天,幼仔眼睛完全睁开。它6个月后断奶,开始吃固体食物。一岁半后离开母大熊猫,独立生活。野外大熊猫幼仔的繁殖成活率远远高于动物园,四分之三的幼仔都能成活。

灰熊在保卫食物和幼崽的时候攻击性较强。它们通常独居,彼此的家域不存在重叠。

考拉熊 

 企鹅 Penguin

袋鼠 kangoroo

cheetah
梅花鹿

北极熊 polar bear

Hyenas 鬣狗

老虎 tiger

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