A huge rat in house sightings often start with faint scratching in the walls, then clear evidence of a large rodent running across floors or gnawing inside cabinets. These situations demand prompt identification, targeted control measures, and ongoing prevention to protect health, property, and peace of mind.
Large rats can squeeze through surprisingly small gaps, reproduce quickly, and contaminate food and surfaces. Understanding how they enter, where they nest, and what attracts them helps you respond effectively and reduce future problems.
| Common Species | Typical Size | Key Indoor Signs | Preferred Habitats |
|---|---|---|---|
| Norway Rat | 300–500 g, 25–30 cm body | Heavy gnaw marks, large droppings up to 2 cm | Basements, ground floors, burrows near foundations |
| Roof Rat | 150–250 g, 20–28 cm body | Greasy rub marks, strong attic odor | Attics, upper walls, trees and shrubs near roof |
| Black Rat | 100–200 g, 1 |