Animals & Nature · Unit 8
Birds
Feathers, beaks, flight and song across the bird world
Birds are the surviving dinosaurs, and almost everything about them is shaped by the demands of flight - hollow bones, a one-way lung, no teeth, and feathers that are structurally remarkable.
The unit covers feathers and flight, beaks and feet as evidence of diet and habitat, eggs and nesting, song and display, and the birds that have abandoned flying entirely.
This unit breaks down into 18 short steps and 108 questions, starting at difficulty 1 and building to 3. Below you can see exactly what it covers, how the path is structured, and worked examples with explanations.
- Steps
- 18
- Questions
- 108
- Difficulty
- 1-3
What this unit covers
- Feathers and Flight
- Remarkable Birds
- Beaks and Feet
- Eggs and Nesting
- Song and Display
Where this fits
Follows Animal Groups. Connects to Dinosaurs and Birds in the Dinosaurs track.
Where people slip
Feathers came before flight. They appear on dinosaurs that could not fly, so they evolved for insulation or display and were later co-opted.
How the unit is structured
Birds runs as 18 short steps that unlock in order. 13 are practice rounds and 5 are challenge rounds that pull together everything before them. Questions start at difficulty 1 and climb to 3 as you progress.
Challenge rounds
Example questions
30 real questions from this unit, with the answer and the reason behind it, grouped by what they practise. There are 108 in the unit altogether.
Beaks and Feet
- Multiple choiceLevel 1
1. What does a bird use instead of teeth?
- A beakcorrect
- Tusks
- Claws only
- A tongue only
A beak grips and breaks food, since birds have no teeth.
- Choose all that applyLevel 2
2. Which foot types match a bird's lifestyle? Pick all that apply.
- Webbed feet for swimmingcorrect
- Talons for gripping preycorrect
- Curved toes for perchingcorrect
- Hooves for running
Webbed feet suit swimming, talons suit hunting and gripping toes suit perching.
- Match the pairsLevel 2
3. Match each bird to its beak or feet.
Answer: Eagle = Hooked beak and talons; Duck = Flat bill and webbed feet; Woodpecker = Chisel beak; Hummingbird = Long thin beak
Beaks and feet are tools shaped by how a bird lives.
- True or falseLevel 3
4. Introduced mosquitoes carrying avian malaria devastated many Hawaiian bird species.
Answer: True
True, and climate warming now lets mosquitoes reach higher refuges.
- Type the answerLevel 3
5. What term describes an animal found naturally in only one place?
Answer: endemic
Endemic species occur nowhere else.
- Choose all that applyLevel 3
6. Which trade-offs shape wing design? Pick all that apply.
- Speed against manoeuvrabilitycorrect
- Gliding efficiency against quick take-offcorrect
- Long-distance economy against agilitycorrect
- Feather colour against song
Speed, manoeuvrability, efficiency and take-off ability all trade against each other.
Eggs and Nesting
- Fill the blankLevel 1
7. Keeping eggs warm until they hatch is called ____.
- incubationcorrect
- migration
- preening
- moulting
Incubation lasts from days to weeks depending on the species.
- True or falseLevel 1
8. Speckled and coloured eggs can be harder for predators to spot.
Answer: True
True. Camouflaged eggs blend into the nest surroundings.
- Choose all that applyLevel 2
9. Which are types of bird nest? Pick all that apply.
- A cup of twigs and mosscorrect
- A hole in a treecorrect
- A scrape on the groundcorrect
- A cardboard box in a shop
Cup nests, tree holes and ground scrapes are all used.
- Put in orderLevel 2
10. Put the stages of raising a brood in order.
Answer: Build the nest -> Lay the eggs -> Incubate them -> Chicks hatch -> Feed until they fledge
Build, lay, incubate, hatch, then feed the chicks until they fledge.
- Multiple choiceLevel 3
11. How does an eggshell allow the embryo to breathe?
- Microscopic pores exchange gasescorrect
- The shell is open at one end
- The chick holds its breath
- The parent breathes for it
Thousands of microscopic pores let oxygen in and carbon dioxide out.
- Type the answerLevel 3
12. Which book by Rachel Carson drew attention to pesticide harm to birds?
Answer: Silent Spring
Silent Spring helped launch modern environmentalism.
Feathers and Flight
- Fact or fibLevel 1
13. Birds replace their old feathers with new ones as they moult.
Answer: True
True. Moulting keeps their plumage in good condition.
- Fill the blankLevel 2
14. Ducks and geese lose many flight feathers at once and become ____ for a while.
- flightlesscorrect
- invisible
- silent
- heavier
They stay hidden on water until new feathers grow.
- Picture questionLevel 2
15. 🪶 Which animal group is this from?
- A birdcorrect
- A mammal
- A fish
- An insect
Only birds have feathers.
- True or falseLevel 2
16. Some feather colours come from structure rather than pigment.
Answer: True
True. Blues and iridescent greens are usually structural colours.
- Choose all that applyLevel 3
17. Which functions did early feathers likely serve? Pick all that apply.
- Insulationcorrect
- Displaycorrect
- Covering eggscorrect
- Powered flight from the start
Insulation, display and brooding all came before flight.
- Multiple choiceLevel 3
18. What did feathered dinosaur fossils reveal about feather origins?
- Feathers appeared before flightcorrect
- Feathers evolved only for flying
- Feathers came from fish scales directly
- Feathers are a modern invention
Feathers evolved before flight, initially for insulation and display.
Remarkable Birds
- True or falseLevel 1
19. The ostrich is the fastest running bird.
Answer: True
True. It can run at around seventy kilometres per hour.
- Build the sentenceLevel 2
20. Build a sentence about birds.
Answer: Feathers help birds fly and stay warm
Feathers help birds fly and stay warm.
- Match the pairsLevel 2
21. Match each bird to what it is known for.
Answer: Arctic tern = Longest migration; Peregrine falcon = Fastest dive; Emperor penguin = Deepest dive; Wandering albatross = Largest wingspan
Birds hold many extraordinary records.
- Choose all that applyLevel 3
22. Which actions help garden birds? Pick all that apply.
- Providing clean watercorrect
- Planting native shrubscorrect
- Making windows visible to birdscorrect
- Removing all vegetation
Water, native plants, safe feeding and reducing window collisions all help.
- Fact or fibLevel 3
23. Citizen science bird counts provide data used in real scientific research.
Answer: True
True. Large volunteer datasets track population trends over decades.
- Multiple choiceLevel 3
24. What role do birds play in ecosystems?
- Pollination, seed dispersal, pest control and clean-up
- They have no ecological role
- They only compete with mammals
- They only eat seeds
They pollinate, disperse seeds, control insects and clean up carrion.
Song and Display
- Multiple choiceLevel 1
25. How do young songbirds learn their songs?
- By listening to adults and practisingcorrect
- They are born knowing every note
- They read music
- They copy mammals
They listen to adults and practise until they get it right.
- Choose all that applyLevel 2
26. Why do birds make sounds? Pick all that apply.
- To warn of dangercorrect
- To attract a matecorrect
- To keep a flock togethercorrect
- To make the wind blow
Warning, attracting mates and keeping a flock together are all reasons.
- True or falseLevel 3
27. Birdsong can vary by region, forming local dialects.
Answer: True
True. Populations develop recognisably different versions.
- Type the answerLevel 3
28. What is the ability of the brain to change and reorganise called?
Answer: plasticity
Plasticity allows learning and seasonal change.
- Choose all that applyLevel 3
29. Which birds are noted mimics? Pick all that apply.
- Lyrebirdcorrect
- Mockingbirdcorrect
- Starlingcorrect
- Ostrich
Lyrebirds, mockingbirds and starlings all imitate other sounds.
- Multiple choiceLevel 3
30. What organ do birds use to produce sound?
- The syrinxcorrect
- The larynx
- The gizzard
- The crop
The syrinx sits where the windpipe splits, and can produce two notes at once.
Where these questions come from. Each unit starts as a plan of the concepts it should cover and the difficulty it should span. Questions are written against that plan with AI assistance, then checked by a validator that rejects anything without a single defensible answer, an explanation, or plausible wrong options. How we write questions sets out the whole process, and corrections are fixed in the bank and reach the site and the app the same day.
How you practise
This unit mixes 10 different question formats, so you are recalling and applying rather than recognising the same layout every time.
- Build the sentence
- Choose all that apply
- Fact or fib
- Fill the blank
- Match the pairs
- Multiple choice
- Picture question
- Put in order
- True or false
- Type the answer
Practise Birds
108 questions across 18 steps. Start with step one and crawl at your own pace.
Play this unitRead about Birds
Explainers from our blog on what this unit covers. Each one ends with real questions from the bank.
- How Do Birds Know Where to Migrate?The sun, the stars, Earth's magnetic field and inherited instinct all play a part in one of nature's great feats.August 28, 2026 · 6 min read
- How Do Animals See Colour? Dogs, Bees, Birds and the Mantis ShrimpColour vision depends on how many kinds of light-sensing cell an eye has. Why dogs see fewer colours than we do, why birds and bees see more.September 14, 2026 · 4 min read
- How Do Penguins Survive the Antarctic Winter? Feathers, Fat and the HuddleEmperor penguins breed in the coldest winter on Earth, the males fasting on the ice for two months. The insulation, the huddle and the physiology behind it.September 14, 2026 · 5 min read
More units in Animals & Nature
- What Is an Animal?What makes something an animal, and what every animal needs
- Pets and Farm AnimalsThe animals we live and work with, and how to care for them
- Animal GroupsMammals, birds, reptiles, amphibians, fish and creatures without backbones
- Habitats and HomesWhere animals live, from rainforest to polar ice, and the homes they build
- Baby Animals and FamiliesEggs and live young, animal parents, and growing up
- What Animals EatDiets, teeth, hunting, and how energy flows through a food chain
- MammalsFur, milk and warm blood, from bats and whales to big cats
- Reptiles and AmphibiansScales and slime: snakes, lizards, turtles, crocodiles, frogs and newts