P3 Classifying Animals

TOPICClassifying Animals 🌍

Animals can be placed into groups based on their characteristics. Here are the ways we classify them:

🥚Reproduction Methods

Animals can be classified by how they reproduce.
Some animals, like the sheep and bat, reproduce by giving birth to their young alive.
Others, like the chicken and beetle, lay eggs.

🫁Breathing Methods

Mammals, birds and reptiles breathe through their lungs.
Most animals that live in water, like fish, breathe through their gills.
Amphibians, like the adult frog, breathe through their lungs and moist skin.
Insects breathe through small breathing holes along their abdomen called spiracles. Some that live underwater may use gills (like the young of the mayfly) or breathing tubes (like the young of the mosquito).

🛡️Outer Coverings

The outer coverings of animals help to protect their body, hold their body in place, and allow the animal to camouflage by blending in with their surroundings.

🐻 Skin Protects from injuries and holds the body together.
🪶 Feathers & Hair Keep warm-blooded animals warm. Feathers also aid birds in flight.
🐊 Scales & Shells Hard coverings that shield animals from harm.

🏠Habitats

Animals that live on land → terrestrial animals
Animals that live in water → aquatic animals
Animals that live both on land and in water → semi-aquatic animals

🏃Movement Methods

They may fly or glide through air, crawl, walk, run, jump or slither on land, or swim and dive in water.

🍽️Eating Habits

Plant-eaters (herbivores) — feed on plants only 🌿
Animal-eaters (carnivores) — feed on animals only 🥩
Omnivores — feed on both plants and animals 🍎🥩

🦴Skeletal Structures

An animal that has a backbone → vertebrate
An animal that has no backbone → invertebrate

🌡️Constant Body Temperature

Cold-blooded animals (insects, fish, most reptiles) — do not have a constant body temperature.
Warm-blooded animals (mammals, birds) — use energy to maintain a constant body temperature.

TOPICCommon Animal Groups 🐾

Scientists have classified animals into many different groups. Here are the six common ones:

📋 All Animal Groups — Full Comparison

Group	Habitat	Outer Covering	Breathing	Reproduction	Body Temp	Backbone?
🐘 Mammals	Land & water 🌊	Hair or fur	Lungs	Most give birth to young alive	Warm-blooded	✅ Yes
🐦 Birds	Most on land	Feathers 🪶	Lungs	Lay eggs 🥚	Warm-blooded	✅ Yes
🐟 Fish	Water 🌊	Scales	Gills	Most lay eggs 🥚	Cold-blooded	✅ Yes
🐛 Insects	Most on land	Hard outer covering	Breathing holes	Most lay eggs 🥚	Cold-blooded	❌ No
🦎 Reptiles	Land & water 🌊	Dry skin with scales	Lungs	Most lay eggs 🥚	Cold-blooded	✅ Yes
🐸 Amphibians	Land & water 🌊	Moist skin	Lungs + moist skin	Lay eggs 🥚	Cold-blooded	✅ Yes

⭐Unique Characteristics

These are the key features that help you identify each group:

🐘 Mammals

Covered with hair or fur
Feed their young with milk 🍼

🐦 Birds

Covered with feathers 🪶
Have a beak

🐛 Insects

Three body parts: head, thorax and abdomen
Six legs attached to the thorax

💡 DID YOU KNOW? An octopus has 3 hearts and its blood is blue! But it's NOT a mammal — no backbone, hair, or milk. That makes it an invertebrate. 🐙

💡 DID YOU KNOW? Butterflies taste food with their feet! They're insects with 3 body parts and exactly 6 legs. 🦋

P3 Classifying Animals 🐾

📋 All Animal Groups — Full Comparison