Vertebrate classification worksheet - Free Printable

Let's solve this worksheet step by step.

Task:

Classify the vertebrates shown in the image into their correct class: Mammals, Reptiles, Amphibians, Fish, or Birds.

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Step 1: Understand the Classes

- Mammals: Warm-blooded animals with hair/fur, give birth to live young (mostly), and produce milk.
- Reptiles: Cold-blooded animals with scales, lay eggs (usually), breathe air.
- Amphibians: Cold-blooded, moist skin, usually start life in water (e.g., tadpoles), then move to land.
- Fish: Live in water, have gills, fins, and scales.
- Birds: Warm-blooded, have feathers, wings, lay hard-shelled eggs.

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Step 2: Identify Each Animal

Here are the animals in the image:

1. Chameleon → Reptile
2. Shark → Fish
3. Dog → Mammal
4. Snake → Reptile
5. Crocodile → Reptile
6. Koala → Mammal
7. Dolphin (or whale-like animal) → Mammal
8. Goldfish → Fish
9. Penguin → Bird
10. Flying bird (pink) → Bird
11. Ray (stingray) → Fish
12. Ostrich → Bird
13. Frog → Amphibian
14. Toad → Amphibian
15. Whale → Mammal

Wait — let’s double-check:
- The blue animal at the bottom right is a whale, which is a mammal.
- The gray animal on a branch is a koala, mammal.
- The pink flying animal is a bird.
- The black-and-white animal is a penguin, which is a bird.
- The orange fish is a goldfish, so fish.
- The stingray is a fish.
- The shark is a fish.
- The chameleon, snake, crocodile → all reptiles.
- Frog and toad → amphibians.
- Dog → mammal.
- Ostrich → bird.

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Step 3: Classify Each Animal

Now let's place each animal under the correct column.

#### ✔ Mammals
- Dog
- Koala
- Dolphin (the one that looks like a dolphin)
- Whale

> Note: The dolphin-like animal is actually a dolphin, but it's often confused with whales. Both are mammals.

#### ✔ Reptiles
- Chameleon
- Snake
- Crocodile

#### ✔ Amphibians
- Frog
- Toad

#### ✔ Fish
- Shark
- Goldfish
- Stingray

> Note: The stingray is a type of fish (cartilaginous fish).

#### ✔ Birds
- Penguin
- Pink flying bird
- Ostrich

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Final Classification Table

| Mammals | Reptiles | Amphibians | Fish | Birds |
|---------------|------------------|----------------|----------------|------------------|
| Dog | Chameleon | Frog | Shark | Penguin |
| Koala | Snake | Toad | Goldfish | Pink bird |
| Dolphin | Crocodile | | Stingray | Ostrich |
| Whale | | | | |

> There are 4 mammals, 3 reptiles, 2 amphibians, 3 fish, and 3 birds.

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Answer Summary

✔ Mammals: Dog, Koala, Dolphin, Whale
✔ Reptiles: Chameleon, Snake, Crocodile
✔ Amphibians: Frog, Toad
✔ Fish: Shark, Goldfish, Stingray
✔ Birds: Penguin, Pink bird, Ostrich

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You can now fill out the table accordingly! Let me know if you'd like a printable version or help drawing the images in. 😊