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
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哺乳动物
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any cold-blooded animal with the ability to live both on land and in water, such as toads, frogs, etc.
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两栖动物
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any of the order of mammals that carry their young babies in a pouch, such as kangaroos, found either in Australia or Americas
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有袋类, 袋鼠类
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a class of terrestrial arthropods that breathe air and have four pairs of limbs, such as spiders, scorpions, etc.
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蛛形纲
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a small creature such as a bee or ant that has six legs, and generally one or two pairs of wings
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昆虫
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a class of animals to which crocodiles, lizards, etc. belong, characterized by having cold blood and scaly skin
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爬行动物
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any small mammal with a pair of strong front teeth, such as mice, hamsters, rats, etc.
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啮齿动物, 啮齿类动物
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any of the mammals that are categorized by thick skin and large hooves, such as elephants, rhinoceroses and hippopotami
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厚皮动物
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any bottom-dwelling marine fish with a flat body, a color similar to the seabed and both eyes on the upper side of the body
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扁鱼, 底鱼
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a strong mammal used for carrying heavy loads, also known as a beast of burden
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负重动物, 驮兽
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any tropical bird, the male of which is colorful and displays unique courtship skills, originated in Papua New Guinea and Australia
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天堂鸟, 极乐鸟
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any bird that migrates regularly from a region to another in different seasons of the year
small animals or insects that are believed to be destructive and are difficult to handle when they appear in a considerable number
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害虫, 有害动物
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an invertebrate animal with a segmented body and a chitinous exoskeleton, such as a spider, crab, etc.
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节肢动物
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species that do not possess or cannot develop a spinal column, such as an arthropod, mollusk, etc.
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无脊椎动物, 无脊椎
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a large group of animals characterized by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes
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脊椎动物
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(of wild animals) living by preying on other animals, especially live animals
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掠食性的, 捕食者的
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a group of mammals, including cows, buffalo, bison, and antelopes, that are characterized by cloven hooves and ruminant digestion
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牛科的, 牛属的
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a quadruped mammal with a slender build and curved horns that is native to Africa or Eurasia
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羚羊
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any mammalian animal that belongs to the same group as humans, such as monkeys, apes, lemurs, etc.
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灵长类动物
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a quadruped mammal that is herbivorous and has a complex digestive system from which it can bring the food back to its mouth and chew it again
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反刍动物, 反刍
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an organism, typically an insect or a tick, that transmits a pathogen or parasite from one host to another
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媒介
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a type of marine invertebrate that can change its shape and form through a process called polymorphism
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多态体
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an animal, typically an insect or a bird, that transfers pollen from one flower to another
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传粉者, 授粉者
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any invertebrate that lives in aquatic or damp habitats and has a soft unsegmented body, often covered with a shell
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软体动物, 双壳类
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a type of mollusk with a single, usually spirally coiled shell, a muscular foot, and a head with sensory tentacles and a mouth
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腹足类
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a fish that can not survive in salty waters and usually lives in lakes or rivers
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淡水鱼, 不能在盐水中生存的鱼
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a fish that can survive in salty water and lives in oceans, also known as marine fish
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咸水鱼, 海水鱼
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