a class of animals to which humans, cows, lions, etc. belong, have warm blood, fur or hair and typically produce milk to feed their young
哺乳动物, 哺乳类动物
人类被归类为哺乳动物，因为他们哺乳幼崽。
an animal with a beak, wings, and feathers that is usually capable of flying
鸟, 鸟儿
我们喜欢从远处听鸟的旋律歌曲。
an animal with a tail, gills and fins that lives in water
鱼, 鱼
我们看到一群鱼在珊瑚礁附近一起游泳。
a small creature such as a bee or ant that has six legs, and generally one or two pairs of wings
昆虫, 虫子
蝴蝶是一种色彩缤纷且美丽的昆虫。
an animal that is hunted and eaten by another animal
猎物, 牺牲品
猎豹的速度有助于捕捉快速移动的猎物。
a group that animals, plants, etc. of the same type which are capable of producing healthy offspring with each other are divided into
物种, 種
帝王蝶是一种每年迁徙数千英里的蝴蝶物种。
a particular type of animal or plant that has typically been domesticated by people in a certain way
品种, 种类
Red Delicious苹果品种以其深红色和甜味而闻名。
a structure that a bird makes for laying eggs or keeping the hatchlings in
巢, 鸟巢
孩子们敬畏地看着小鸡在巢中孵化。
any of the light and soft parts covering the body of a bird
羽毛, 羽
美洲原住民的头饰装饰着色彩斑斓的鹰羽毛，象征着勇气和荣誉。
the thick, soft hair that grows on the body of some animals such as cats, dogs, etc.
毛皮, 毛发
狐狸的皮毛在阳光下闪闪发光，当它快速穿过森林时。
a sharp and curved nail on the toe of an animal or a bird
爪子, 爪
老虎强大的爪子使它成为优秀的猎手。
any of the two parts of the body of a bird, insect, etc. used for flying
翅膀, 翼
他研究了蝙蝠的翅膀结构以了解其飞行机制。
the part of the body of an animal, a bird or a fish that sticks out at the back, which can move
尾巴, 动物的尾巴
孔雀骄傲地展示它色彩斑斓的尾巴羽毛。
an animal's foot that typically has a combination of nails, claws, fur, and pads
爪子, 脚掌
狐狸小心翼翼地把它受伤的爪子放在地上，一瘸一拐地穿过森林。
a place where many kinds of animals are kept for exhibition, breeding, and protection
动物园, 动物公园
我们在动物园拍摄了彩色鹦鹉的照片。
a large container usually made of glass that is filled with water in which fish and other sea creatures are kept
水族箱, 鱼缸
水族馆的珊瑚礁展览看起来像一个小小的海洋。
(of an animal or plant) living or growing in a natural state, without any human interference
野生的, 自然的
我们徒步穿越了野生森林，观察了各种动植物。
(of an animal) capable of living with humans, either on a farm or as a pet in a house
驯养的, 家养的
家畜的照顾和福利是农民和动物主人的重要考虑因素。
(of a bird or animal) Unable to fly
不会飞的, 不能飞的
渡渡鸟是一种不会飞的鸟，几个世纪前就灭绝了。
(of an animal, plant, etc.) being at risk of extinction
濒危的
气候变化通过改变栖息地和食物来源，对许多濒危物种构成了重大威胁。
describing an animal that its body temperature changes depending on the temperature of its surroundings
冷血的, 变温的
依赖潮湿的环境，蝾螈，冷血生物，保持它们的体温。
describing an animal that is able to maintain a higher body temperature than its surroundings
温血的, 恒温的
生活在寒冷的海洋环境中，鲸鱼，温血哺乳动物，保持恒定的体温。
