How Do You Tell the Difference Between a Native Rat and a Pest Rat?

Key takeaways

Why It Matters: Native vs Pest Rats

Australia is home to incredible wildlife, including marsupials that are often mistaken for rats. The problem? Pest rodents such as the black rat, or Rattus rattus, and the brown rat, or Rattus norvegicus, are destructive invaders.

Key Differences Between Native and Pest Rats

Pest Rats (Black Rat, Brown Rat)

Tail and Ears: They havelong, scaly tails, usually longer than their bodies, and have large, hairless ears.

Snout and Face Shape: They have a long, pointed snout with sharp features.

Size and Body Build: Larger bodies, strong front teeth designed for gnawing timber, plastic, and wiring.

Behaviour and Habitat: Thrive in urban areas, invade homes, and nest in roofs, drains, and wall cavities.

Native Rats (Bush Rats, Antechinus)

Tail and Ears: Native rats have tails that are often shorter and fur-covered, like smaller, rounded ears.

Snout and Face Shape: Blunter snouts, softer facial structure, and in the case of marsupials like the antechinus, tiny sharp teeth instead of large rodent incisors.

Size and Body Build: Smaller and more delicate; some, like the bush rat, look similar but don’t grow as large.

Behaviour and Habitat: Prefer bushland, grasslands, and woodland areas. Rarely invade houses unless forced by habitat loss.

How to Tell If a Rat Is Native or a Pest

If you’re unsure, here are practical steps:

Check the tail, if it's scaly and long, that’s a pest rat. And if it’s shorter and furrier, it’s native.

Look at the ears. Pest rats have a prominent and hairless tail, while small and rounded ones could be native.

Observe this behaviour, like frequenting your kitchen or gnawing wires that means it is certainly a pest.

You consider your location. In the bush, you’re more likely to spot natives. In your home, pests are the main suspects.

Common Mistakes: Native Animals That Look Like Rats

Why Professional Identification and Removal Matters

Attempting DIY pest control when you’re unsure can do more harm than good. Misidentifying a native animal as a pest could harm protected wildlife. On the other hand, ignoring a genuine rodent infestation can quickly escalate into property damage and health risks.

Final Thoughts

Knowing the difference between native and pest rats is more than a party trick, it’s essential for keeping your home safe while respecting Australia’s unique wildlife. If you suspect rats at home and aren’t sure whether they’re natives or pests, don’t take chances.

Frequently Asked Questions About Native Rat and a Pest Rat (FAQs)

What native animal looks like a rat?

Marsupials like the antechinus and bush rats look similar but are not pests. They’re smaller, with furred tails and different facial features.

How to tell if a rat is native?

Look for fur on the tail, rounded ears, and a bushland habitat. Pest rats have scaly tails and usually live in homes and cities.

Would I know if I had rats in my house?

What do house rats look like?

House rats are larger, with long scaly tails, large ears, and sharp snouts. They’re much bigger than native lookalikes.

How can you tell if it’s a rat?