Animals and their groups · Kindergarten
There are millions of kinds of animals. Animals with a backbone (vertebrates) are sorted into five groups: fish, amphibians, reptiles, birds and mammals. We can also sort animals by what they eat: carnivores eat meat, herbivores eat plants, and omnivores eat both.
Key facts
- Fish live in water, breathe with gills, have scales and fins, and most lay eggs.
- Amphibians, like frogs and newts, have smooth, moist skin. They start life in water and many live on land as adults. They lay their eggs in water.
- Reptiles, like snakes, lizards, crocodiles and tortoises, have dry, scaly skin. Most lay eggs with leathery shells on land.
- Birds have feathers, wings and a beak, and lay eggs with hard shells. Most birds fly, but some can’t, like penguins and ostriches.
- Mammals have hair or fur and feed their babies on milk. Most give birth to live young. Humans, whales and bats are mammals.
- Carnivores eat other animals, herbivores eat only plants, and omnivores eat both plants and animals.
- Animals without a backbone are invertebrates: insects have 6 legs and spiders have 8.
Worked examples
Example 1
Which group does each animal belong to: a shark, a frog, a snake, an owl, a rabbit?
Answer: shark: fish; frog: amphibian; snake: reptile; owl: bird; rabbit: mammal
Example 2
A rabbit eats grass, an owl eats mice, and a bear eats berries, fish and honey. Is each one a carnivore, a herbivore or an omnivore?
Answer: rabbit: herbivore; owl: carnivore; bear: omnivore
Example 3
A whale lives in the sea and has fins. Is it a fish?
Answer: no, it is a mammal: it breathes air with lungs, feeds its young on milk and gives birth to live young
Example 4
How many legs do 3 spiders have?
Answer: 24