This printable worksheet helps students practice sorting animals into their correct biological groups.

Let’s go step by step to sort each animal into the correct group: mammals, fish, or birds.

First, remember what each group means:
- Mammals are animals that usually have fur or hair, give birth to live babies (not eggs), and feed their babies milk. Examples: dogs, cats, humans.
- Fish live in water, have gills to breathe, and most have scales and fins. They lay eggs. Examples: goldfish, salmon.
- Birds have feathers, wings, and lay eggs. Most can fly, but not all (like penguins or ostriches). Examples: sparrows, eagles.

Now let’s look at each animal one by one:

1. lion → Has fur, gives live birth, feeds cubs milk → mammal
2. shark → Lives in water, has gills, no legs → fish
3. bat → Has fur, flies, but gives live birth and feeds young milk → mammal (yes, bats are mammals!)
4. guppy → Small colorful fish, lives in water → fish
5. tuna → Big ocean fish → fish
6. toucan → Colorful bird with big beak → bird
7. seal → Lives in water but breathes air, has fur, gives live birth → mammal
8. cow → Farm animal, gives milk, has fur → mammal
9. pelican → Water bird with big pouch → bird
10. canary → Small singing bird → bird
11. parrot → Colorful talking bird → bird
12. bass → Type of fish → fish
13. seahorse → Looks weird, but it’s a fish! → fish
14. whale → Huge ocean animal, but gives live birth and feeds milk → mammal
15. sheep → Woolly farm animal → mammal
16. giraffe → Tall animal with spots → mammal
17. ostrich → Big bird that can’t fly → bird
18. eagle → Bird of prey → bird
19. penguin → Bird that swims, can’t fly → bird
20. barracuda → Sharp-toothed fish → fish
21. marlin → Fast ocean fish → fish

Now let’s put them in groups:

✔ Mammals: lion, bat, seal, cow, whale, sheep, giraffe
✔ Fish: shark, guppy, tuna, bass, seahorse, barracuda, marlin
✔ Birds: toucan, pelican, canary, parrot, ostrich, eagle, penguin

Wait — let’s count to make sure we didn’t miss any.

Total animals listed: 21

Mammals: lion, bat, seal, cow, whale, sheep, giraffe → 7
Fish: shark, guppy, tuna, bass, seahorse, barracuda, marlin → 7
Birds: toucan, pelican, canary, parrot, ostrich, eagle, penguin → 7

Perfect — 7 + 7 + 7 = 21. All accounted for!

Final Answer:
mammals: lion, bat, seal, cow, whale, sheep, giraffe
fish: shark, guppy, tuna, bass, seahorse, barracuda, marlin
birds: toucan, pelican, canary, parrot, ostrich, eagle, penguin