# Classifying Mammals

Part of the Mammal Study Merit Badge Digital Resource Guide: [Introduction & Overview](https://merit-badge.university/merit-badges/mammal-study/guide/index.md)

*2. Classification & Taxonomy*

> **2.** Explain how the animal kingdom is classified. Explain where mammals fit in the classification of animals. Classify three mammals from phylum through species.

A raccoon, a moose, and a bat do not look much alike, but classification helps scientists explain why they are still related. Taxonomy is the system used to organize living things into groups based on shared traits and evolutionary relationships. In Mammal Study, classification helps you move from general observations to precise identification.

## The Main Classification Levels

A common school-level sequence is:

- **Kingdom**
- **Phylum**
- **Class**
- **Order**
- **Family**
- **Genus**
- **Species**

As you move down the list, each group gets narrower and more specific.

| Level | What it tells you |
|---|---|
| Kingdom | Broadest major group |
| Phylum | Basic body plan and major structure |
| Class | Large shared features |
| Order | Smaller branch within a class |
| Family | Closely related group |
| Genus | Very closely related organisms |
| Species | One exact kind of organism |

> **Tip**
>
> A simple memory aid is “King Philip Came Over For Good Soup,” but do not rely on the mnemonic alone. Make sure you can explain what each level actually means.

## Where Mammals Fit

Mammals fit into animal classification like this:

- **Kingdom:** Animalia
- **Phylum:** Chordata
- **Class:** Mammalia

That means mammals are animals, they belong to the phylum that includes animals with a notochord or backbone-related structure, and they are one class within that phylum.

From there, mammals split into many orders such as:

- **Carnivora** — dogs, cats, bears, raccoons, seals
- **Rodentia** — mice, rats, squirrels, beavers, porcupines
- **Chiroptera** — bats
- **Lagomorpha** — rabbits and hares
- **Artiodactyla** — deer, elk, bison, pigs, antelope
- **Primates** — humans, monkeys, apes

## Three Example Classifications

You will probably choose mammals that live in or near your own area, but these examples show what a full classification looks like.

| Common name | Phylum | Class | Order | Family | Genus | Species |
|---|---|---|---|---|---|---|
| Raccoon | Chordata | Mammalia | Carnivora | Procyonidae | *Procyon* | *Procyon lotor* |
| White-tailed deer | Chordata | Mammalia | Artiodactyla | Cervidae | *Odocoileus* | *Odocoileus virginianus* |
| Big brown bat | Chordata | Mammalia | Chiroptera | Vespertilionidae | *Eptesicus* | *Eptesicus fuscus* |

## How to Classify Your Own Three Mammals

### Step 1: Pick mammals you can actually research well

Choose species with reliable sources. Local field guides, state wildlife agency pages, museum collections, and university resources are strong choices.

### Step 2: Start with the easy shared levels

If your animal is definitely a mammal, the first three levels are usually the same:

- Kingdom Animalia
- Phylum Chordata
- Class Mammalia

### Step 3: Find the exact order, family, genus, and species

This is where careful research matters. A coyote and a fox are both in order Carnivora, but not in the same genus. A deer mouse and a house mouse may look similar, but they are not the same species.

### Step 4: Write scientific names correctly

Scientific names use two parts:

- **Genus** capitalized
- **species** lowercase

They are usually italicized in print, like *Canis latrans* for coyote.

**Good Classification Habits** — Use these to avoid common mistakes

- [ ] Use the exact common name, not just “mouse” or “bat.”
- [ ] Double-check that your source is talking about the same species in your region.
- [ ] Make sure genus and species match each other.
- [ ] Keep the classification levels in the right order.
- [ ] Bring your sources so you can explain where your information came from.

## Why Classification Matters in Real Life

Classification is not just memorization. It helps people:

- compare animals with similar body plans
- predict behavior or diet from related groups
- understand disease and parasite relationships
- track endangered species accurately
- organize museum and wildlife records

In [Req 3c](https://merit-badge.university/merit-badges/mammal-study/guide/req3c/) and [Req 4c](https://merit-badge.university/merit-badges/mammal-study/guide/req4c/), good classification will make your life-history work much stronger because it helps you put one species in the right biological context.

## Official Resources

These official resources are best used to reinforce the structure of classification and to help you verify the three mammals you choose.

Video: [The 5 Kingdoms in Classification (video)](https://youtu.be/oID1h-zL-uw?si=jHkAIYYgKaxKTZwG)

Video: [Animal Classification (video)](https://youtu.be/L6anmd7DnYw?si=tVuoSQOwEYpKbYO7)

Video: [The Three Types of Mammals, Differences, and How to Tell (video)](https://youtu.be/YAgjPwiSbvA?si=gwU-5Y3dVcmjt8Z7)

[Mammal Species of the World Database (website)](https://www.departments.bucknell.edu/biology/resources/msw3/browse.asp): A large reference database you can use to confirm scientific names, genera, and families for many mammal species.

Classification gives you the map. Next, you will choose a field-study path that lets you use those ideas with real mammals or real mammal evidence.

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- Previous: [What Makes a Mammal?](https://merit-badge.university/merit-badges/mammal-study/guide/req1/index.md)
- Next: [Choose Your Field Study](https://merit-badge.university/merit-badges/mammal-study/guide/req3/index.md)