Amphibian refers to a group of cold-blooded vertebrates that spend part of their lives in water and part on land. They are characterized by their ability to absorb oxygen through their skin and are also known for their unique life cycle which includes a larval stage with gills and a metamorphosis to an adult stage with lungs. Amphibians include frogs, toads, salamanders, and newts, and are found all over the world except for Antarctica. They are an important part of many ecosystems, serving as both predators and prey, and their sensitive skin makes them useful for monitoring environmental changes. However, many species of amphibians are facing threats such as habitat destruction, pollution, and disease, and are in danger of extinction.

What is "amphibian"?

amphibian

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Reptile refers to a class of animals that are characterized by their cold-bloodedness, scaly skin, and egg-laying reproduction. They are found all over the world in a wide range of habitats, from deserts to rainforests to oceans. Reptiles include familiar animals like snakes, lizards, turtles, and crocodiles. Many species of reptiles are predators, using their sharp teeth and powerful jaws to catch and eat prey. Others are herbivores, feeding on plants or fruits. Some reptiles are venomous, while others are harmless to humans. Reptiles play an important role in ecosystems as both predator and prey, and their conservation is crucial for maintaining a healthy and diverse environment.

What is "reptile"?

reptile

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extinction

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Predator refers to a group of animals that primarily feed on other animals, known as prey, in order to survive. Predators have adaptations that enable them to locate, catch, and kill their prey, such as sharp teeth, powerful jaws, and excellent senses of sight, smell, and hearing. Some examples of predators include lions, wolves, sharks, and eagles. Predators are typically at the top of the food chain in their ecosystem and play a vital role in controlling the populations of other animals. However, human activities such as hunting and habitat destruction have threatened many predator species, leading to declines in their populations and negative effects on the environment.

What is "predator"?

predator

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A snout is a prominent and elongated facial feature found in many animals, particularly those in the mammalian and reptilian groups. It refers to the front part of the head that extends beyond the mouth and contains the nostrils. The shape and size of the snout can vary greatly depending on the species. It is typically covered in skin, often with specialized sensory structures such as whiskers, tactile hairs, or specialized receptors. The snout serves various functions depending on the animal. It can be used for feeding, sniffing, digging, or as a sensory organ to detect and locate food, mates, or potential threats. In some species, the snout may also play a role in communication, defense, or as a specialized tool for manipulating objects in the environment. Overall, the snout is an important and versatile adaptation that helps animals interact with their surroundings and fulfill their ecological roles.

What is a "snout"?

snout

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trunk

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An antenna is an appendage attached to the head of some animals, including insects, crustaceans, and some mollusks. They are primarily sensory structures used for detecting touch, smell, and taste. The antennae are composed of a series of segments called antennomeres, which are connected by flexible joints. The shape and size of antennae can vary widely between different species, with some being thin and elongated while others are short and stout. Antennae can also be modified for specific purposes, such as for use as weapons, or for attracting mates through pheromones. In insects, the antennae are also important for flight, as they help to stabilize the insect's orientation and sense changes in wind speed and direction. Overall, the structure and function of antennae vary greatly across different animal groups, but they are an important sensory organ for many organisms.

What is an "antenna"?

antenna

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Horn refers to a hard, pointed, and often curved growth that extends from the head of certain animals, such as cattle, goats, and rhinoceroses. It is composed of a tough protein called keratin and serves various purposes depending on the species. Horns can be used for defense against predators, as a symbol of dominance and territoriality, for ritualistic or decorative purposes, or even as a sound-producing instrument. Unlike antlers, which are shed and regrown annually, horns are usually permanent structures that continue to grow throughout the animal's life. They are an iconic feature of many species and play a significant role in their biology and behavior.

What is "horn"?

horn

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A beak is a distinctive feature found in many bird species, serving as their primary tool for feeding, communication, and other essential tasks. It is a specialized structure composed of a hard, keratinous covering that forms the upper and lower parts of the bird's mouth. The beak comes in various shapes and sizes, reflecting the specific adaptations of different bird species to their ecological niches. It may be long and slender for probing into the ground or water to capture prey, short and stout for crushing seeds or nuts, or curved and sharp for tearing flesh. The beak plays a vital role in gathering and consuming food, building nests, defending territory, and engaging in social interactions. It is a versatile and adaptable tool that allows birds to thrive in diverse environments and fulfill their ecological roles.

What is a "beak"?

beak

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herd

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A tusk is a long, pointed, and often curved tooth that protrudes from the mouth of certain animals, most notably elephants, walruses, and narwhals. These elongated teeth are typically made of ivory, a dense and durable material. Tusks serve various purposes depending on the species. They can be used for defense, digging, gathering food, or as a display of dominance during mating rituals. The size and shape of tusks can vary greatly between species and even individuals, with some reaching impressive lengths. Tusks are iconic features of these animals and hold cultural and historical significance.

What is a "tusk"?

tusk

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flock

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larva

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Livestock refers to domesticated animals that are primarily raised for agricultural purposes, such as food production, labor, or other commodities. This category includes various animals, such as cattle, sheep, pigs, poultry, and horses, among others. Livestock plays a significant role in agriculture and food systems, providing essential resources like meat, milk, eggs, and fiber. They are typically managed in dedicated facilities, such as farms or ranches, where their breeding, feeding, and overall care are carefully regulated to ensure optimal production and welfare. Livestock serves as an important source of livelihood for many people worldwide and contributes to the global food supply and economy.

What is "livestock"?

livestock

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A herbivore is an animal that feeds mainly on plants and other vegetation. These animals have digestive systems that are adapted to break down and extract nutrients from plant material. Herbivores can be found in various animal groups such as mammals, birds, reptiles, insects, and fish. They play a crucial role in the food chain by converting plant material into energy and serving as prey for carnivorous animals. Some common examples of herbivores include cows, horses, rabbits, elephants, and many species of birds. While herbivores may consume different types of plants depending on their diet, they tend to have teeth and jaws that are specialized for breaking down tough plant matter and often have long digestive tracts to allow for the slow breakdown and absorption of nutrients.

What is a "herbivore"?

herbivore

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A carnivore is an animal that primarily feeds on meat or flesh. They have adapted to hunting and consuming meat as their primary source of nutrition. Some examples of carnivores include lions, tigers, wolves, hyenas, and sharks. Carnivores typically have sharp teeth and claws, powerful jaws, and keen senses to help them locate and capture their prey. They are often at the top of the food chain and play an important role in maintaining the balance of their ecosystem. Some carnivores are also scavengers and will consume the remains of dead animals, while others are strictly predators that actively hunt their prey.

What is a "carnivore"?

carnivore

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Vertebrate refers to a group of animals with a backbone or spinal column. They are part of the phylum Chordata and include mammals, birds, reptiles, amphibians, and fish. Vertebrates have an internal skeleton made of bone or cartilage that protects their nervous system and provides support for their bodies. They also have a well-defined head with a brain and sensory organs, such as eyes, ears, and a nose. Vertebrates have a closed circulatory system with a heart and blood vessels that transport oxygen and nutrients to their cells. They are characterized by their ability to move efficiently on land, in water, or in the air, thanks to their complex muscular system.

What is "vertebrate"?

vertebrate

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invertebrate

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An antler is a bony structure that is unique to members of the deer family, including deer, elk, moose, and reindeer. They are typically found only in males, although female reindeer also possess antlers in some populations. Antlers are made of bone tissue and are composed of a complex network of blood vessels and living cells during their growth phase. They are branched structures that emerge from the frontal bones of the skull and continue to grow and develop each year. Antlers serve various purposes, including defense, dominance displays, and attracting mates during the breeding season. They are shed and regrown annually through a process called antler casting, which involves the shedding of the outer velvet layer and eventual hardening of the bony core. The size, shape, and number of antler branches can vary greatly among species and even among individuals within a species, making them an intriguing feature of many ungulate species.

What is an "antler"?

antler

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hibernation

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The hoof is a tough and hard outer covering found on the lower extremities of certain animals, particularly ungulates like horses, cows, and deer. It serves as a protective structure and supports the weight of the animal, allowing for locomotion and stability on various terrains. The hoof is composed of a dense keratinized material, similar to human nails, and is divided into distinct parts, including the wall, sole, and frog. The hoof plays a vital role in the animal's movement, enabling it to graze, run, and navigate its environment effectively. Regular hoof care and maintenance are essential for the overall health and well-being of the animal.

What is a "hoof"?

hoof

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furry

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venomous

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migratory

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ruminant

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marine

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bipedal

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Whiskers, also known as vibrissae, are specialized hairs that grow on the face and other parts of the body of certain mammals, including cats, dogs, and seals. These sensory hairs are thicker than the other hairs on the body and are deeply embedded in hair follicles surrounded by blood vessels and nerves. Whiskers are used by animals to sense their environment by detecting even the slightest movement, air currents, and vibrations in the surrounding space. They help animals navigate in the dark, detect prey, and avoid predators. Whiskers are particularly important for nocturnal animals, who rely on their sense of touch to find their way around. Some animals can even move their whiskers independently to improve their perception of their surroundings.

What is a "whisker"?

whisker

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Here, you will learn some English words related to Animals that are necessary for the Academic IELTS exam.

学术雅思词汇："动物"