Animal groups: fish, amphibians, reptiles, birds and mammals

Animal groups: fish, amphibians, reptiles, birds and mammals: what children learn

The groups are based on things children can see or find out. Fish have gills and fins. Amphibians, such as frogs and newts, have smooth, damp skin and start life in water. Reptiles have dry, scaly skin. Birds are the only animals with feathers. Mammals have hair or fur and feed their babies milk. Once children know these clues, the tricky animals become fun to explain: a whale lives in the sea but is a mammal, a penguin cannot fly but is still a bird, and a bat flies but is not a bird.

Suggested kindergarten practice, selected by skill and reading demand. US states and schools teach these topics in different grades; this is not a state-standards alignment claim.

Next Generation Science Standards teaching connection: Science observation, models and explanations. Use this vocabulary or sequencing game before observing a real example, drawing a model, or explaining an idea with evidence. This is a teaching connection to the NGSS approach, not a claim that the game meets a particular performance expectation. Read the framework.

How to play

Sort the cards into the right groups. Tap a card, then its group. You can also drag a card, or press the number on its group. Each game has 3 rounds with no timer. Every card is checked as soon as you place it: a card in the wrong group comes back with a hint, and you get a point for each card you place right first time. For a quicker go, choose Quick quiz: 10 multiple-choice questions in 120 seconds (choose Relaxed for more time).

Step by step

1. Look at the outside. Ask what covers the animal: fur or hair, feathers, dry scales, or smooth damp skin. This one clue sorts most animals straight away.
2. Check for feathers. If it has feathers, it is a bird. Every bird has feathers and no other animal does, even birds that cannot fly.
3. Ask how it breathes. Fish breathe underwater through gills. Whales and dolphins swim but come up to breathe air, which is a clue that they are not fish.
4. Ask how babies are fed. Mammals feed their babies milk. Dogs, horses, bats, whales and people are all mammals.
5. Think about water and land. Amphibians usually start life in water (frogspawn and tadpoles) and live on land and in water as adults. Reptiles lay eggs on land.

Worked examples

Common mistakes and how to fix them

• Thinking every animal that swims is a fish. Talk about breathing. Fish use gills; whales, dolphins and seals come up for air, and they are mammals.
• Thinking every animal that flies is a bird. Bats fly but have fur and feed their babies milk, so they are mammals. Only birds have feathers.
• Mixing up amphibians and reptiles. Compare a newt and a lizard. The newt has smooth, damp skin (amphibian); the lizard has dry, scaly skin (reptile).
• Leaving people out. Children are often surprised that humans are animals too. We have hair and babies drink milk, so we are mammals.

Activities to try at home

• On a walk or at the park, count the birds, mammals and minibeasts you see. Which group wins?
• Sort soft toys or animal pictures into five piles: fish, amphibians, reptiles, birds and mammals.
• Play "I am thinking of an animal": give one clue at a time (I have feathers… I cannot fly…) until your child guesses.
• Print the worksheet and ask your child to explain one answer to you using a clue, such as "It has feathers."

Ideas for the classroom

• Make five hoops on the floor, one per group, and give each student an animal card to place and explain.
• Show close-up photos of skin, scales, feathers and fur and ask students to name the group from the covering alone.
• Run a "true or false" round with tricky animals: whale, bat, penguin, shark, newt.
• Use the game as a starter and ask students to write the clue that helped them on a mini whiteboard.

Free printable game and worksheet

The free printable starts with a game sheet, such as a color-by-answer picture, an answer maze or a secret-code joke, followed by a worksheet. Both use the same checked questions as the online game, and the answers are on the last page. Print it, or save it as a PDF from your browser’s print menu.

Open the free printable game and worksheet

Frequently asked questions

Related topics

• Parts of a plant: roots, stem, leaves and flowers (Kindergarten science) – Match roots, stem, leaves, flowers, trunk and bark to what they do. A free Kindergarten science game about plant parts, with a printable game and worksheet.
• Classifying animals: vertebrates and invertebrates (Grade 5 science) – Is a spider an insect? Is a woodlouse? A free Grade 5 science game about classifying animals into vertebrates, invertebrates and smaller groups.

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