Short answer: The animals theme rewards precise words such as biodiversity, habitat, endangered and adaptation. Each replaces a vague phrase - 'lots of different animals', 'where they live', 'dying out', 'getting used to' - with an accurate, less common item, and that precision is what lifts your Lexical Resource band and signals higher-band control.
Animals and wildlife come up throughout IELTS - in Reading passages on evolution and conservation, in Writing Task 2 questions about zoos and endangered species, and in Speaking questions about pets and the natural world.
Because the theme is so predictable, its vocabulary can be prepared in advance, and a candidate who writes habitat loss and an endangered species instead of 'no home' and 'almost gone' reads at once as a higher-band user.
This guide gives you 30 genuine Band 7+ animal words, each with the collocation that makes it usable and a correct example sentence.
Why topic vocabulary lifts your Lexical Resource band
In both Writing and Speaking, Lexical Resource is one of four criteria, each carrying equal weight, so it accounts for a full quarter of your mark on those papers.
The public band descriptors state that Band 7 uses 'less common lexical items with some awareness of style and collocation' - exactly the kind of precise, topic-specific language that a predictable theme like wildlife lets you prepare in advance rather than improvise under pressure.
Accuracy matters more than decoration, though. A less common word dropped into the wrong collocation - writing 'make an extinction' or 'a big biodiversity' - reads as reach without control and can lower your band rather than raise it.
That is why every entry below is paired with the words it naturally travels with. For a structured month of building this vocabulary across topics, follow our 30-day vocabulary plan.
30 Band 7+ Animals words
Read down the table for each word's meaning, then across to its natural collocation and an example that shows the word doing the job it would do in a real answer.
| Word | Meaning | Collocation / common usage | Example sentence |
|---|---|---|---|
| species | a group of organisms able to interbreed with one another | an endangered species, a native species | Each species has evolved to fill a particular role within its habitat. |
| habitat | the natural environment in which an organism lives | a natural habitat, habitat loss | Habitat loss is the single greatest threat to the world's wildlife today. |
| predator | an animal that hunts and kills others for food | a natural predator, a top predator | Removing a predator can allow prey populations to grow out of control. |
| prey | an animal that is hunted and eaten by another | fall prey to, natural prey | Rabbits are the natural prey of foxes and birds of prey alike. |
| carnivore | an animal that feeds mainly on the flesh of others | a large carnivore, a strict carnivore | As a strict carnivore, the cat cannot survive on a plant-based diet. |
| herbivore | an animal that feeds only on plants | a grazing herbivore, a large herbivore | Grazing herbivores such as deer shape the vegetation of entire grasslands. |
| omnivore | an animal that eats both plants and other animals | an opportunistic omnivore | As an omnivore, the bear eats berries, fish and small mammals alike. |
| nocturnal | active during the night rather than the day | a nocturnal animal, nocturnal habits | Many desert animals are nocturnal, resting through the fierce daytime heat. |
| migration | the seasonal movement of animals between regions | seasonal migration, an annual migration | The annual migration of wildebeest is one of nature's great spectacles. |
| hibernation | a dormant winter state in which an animal conserves energy | enter hibernation, emerge from hibernation | Bears enter hibernation to survive the months when food is scarce. |
| camouflage | colouring or shape that conceals an animal from view | natural camouflage, provide camouflage | The insect's green wings provide near-perfect camouflage among the leaves. |
| adaptation | a feature that helps an organism survive in its environment | an evolutionary adaptation, a clever adaptation | The camel's hump is an adaptation to life in an arid environment. |
| instinct | an innate, unlearned pattern of behaviour | act on instinct, a natural instinct | Newly hatched turtles head for the sea by instinct alone. |
| domestication | the taming of wild animals for human use over generations | the domestication of animals, centuries of domestication | The domestication of the dog began many thousands of years ago. |
| endangered | at serious risk of dying out completely | an endangered species, critically endangered | The tiger remains critically endangered despite decades of protection. |
| extinction | the complete dying out of a species | drive to extinction, on the brink of extinction | Hunting drove several bird species to extinction within a single century. |
| biodiversity | the variety of living organisms in a habitat | rich biodiversity, protect biodiversity | Tropical rainforests contain a richer biodiversity than any other habitat. |
| ecosystem | a community of organisms together with their environment | a fragile ecosystem, disrupt an ecosystem | Introducing a foreign species can disrupt an entire ecosystem. |
| conservation | the protection of species and their habitats | wildlife conservation, conservation efforts | Conservation efforts have helped several whale populations recover. |
| poaching | the illegal hunting or capture of wild animals | combat poaching, elephant poaching | Poaching for ivory continues to threaten Africa's remaining elephants. |
| captivity | the state of being confined by humans, as in a zoo | kept in captivity, breed in captivity | Some argue that intelligent animals suffer when they are kept in captivity. |
| scavenger | an animal that feeds on the remains of dead creatures | a natural scavenger, act as scavengers | Vultures are scavengers that clear the landscape of dead animals. |
| territorial | inclined to defend an area against rivals | highly territorial, territorial behaviour | Male robins are fiercely territorial during the breeding season. |
| apex predator | a predator at the very top of its food chain | an apex predator, the region's apex predator | As an apex predator, the shark helps keep fish populations in balance. |
| keystone species | a species on which a whole ecosystem strongly depends | a keystone species | The sea otter is a keystone species whose loss would transform the reef. |
| symbiosis | a close, often mutually beneficial relationship between species | live in symbiosis, a form of symbiosis | The clownfish and the sea anemone live in a remarkable symbiosis. |
| gestation | the period during which young are carried before birth | a long gestation, the gestation period | The elephant has one of the longest gestation periods of any mammal. |
| arboreal | living in or among trees | an arboreal species, arboreal mammals | Sloths are arboreal animals that spend almost their entire lives in trees. |
| endemic | native to and found only in one particular region | endemic to, an endemic species | The lemur is endemic to Madagascar and lives nowhere else on earth. |
| offspring | the young produced by an animal | produce offspring, protect their offspring | Many mammals will fiercely defend their offspring against any threat. |
How to turn these words into marks
Learn each word inside its collocation rather than on its own: memorising habitat alone helps little, but 'habitat loss' and 'a natural habitat' give you ready-made phrases you can use without a grammar risk.
Use one or two precise items per paragraph where they genuinely fit - accuracy earns more than a parade of impressive nouns you cannot control.
To make the words active, meet them again in the animals reading practice and drill a word a day with the Word Coach.