Rats can show up in basements, crawl spaces, or along sewer systems near your home. As a licensed technician since 2015, I’ve helped hundreds of homeowners in Old Town get rid of rat problems. Whether you spot a brown rat near trash or a roof rat in a tree, knowing which type of rat you have speeds up treatment and cuts health risks.
Why Identifying the Rat Type Matters
Different rats need different traps, bait, and placement. A Norway rat in a ground burrow needs treatment in a different spot than a roof rat entering from a tree line. Knowing which rat you have also tells you the disease risks involved and helps us avoid harming native wood rats that aren’t pests.
For more on telling rats from mice, see rats vs mice differences.
Main Rat Species
Norway Rat (Rattus norvegicus)
The most common pest rat in our area. Also called the brown rat or sewer rat.
- Color: Gray to grayish-brown fur
- Size: 316-460 mm total length, according to Virginia DWR
- Tail: Shorter than head-plus-body, two-toned
- Habitat: Ground burrows, sewers, basements
- Risks: Main carrier of leptospirosis and rat-bite fever
- Breeding: Females can have up to five litters per year
Norway rat infestations often start near trash and along foundation walls.
Roof Rat (Rattus rattus)
Also called the black rat. A skilled climber that nests in high places.
- Color: Black to light brown fur
- Size: Smaller body than Norway rats but with a longer tail
- Tail: Longer than head-plus-body, used for balance
- Habitat: Trees, vines, upper levels of buildings, coastal areas
- Risks: Can spread flea-borne murine typhus; historical plague carrier
- Damage: Wiring damage from gnawing is a common concern
Other Rat Species in Our Area
Pack rats / Wood rats (Neotoma spp.): Large eyes and ears, hairy (not scaly) tails. Known for collecting debris. Rarely enter homes. Protected as native species in some areas.
Marsh rice rats: Live in tidal marshes near the Chesapeake Bay. Can carry coastal hantavirus strains but are low risk indoors.
Cotton rats: Coarse “hispid” fur, found in fields and sheds. Young ones sometimes wander into outbuildings by mistake.
Signs of a Rat Problem
Watch for these clues that tell you what type of rat you have:
- Droppings: Capsule-shaped and blunt = Norway rat. Pointed and smaller = roof rat
- Gnaw marks: Low on boxes and walls = Norway rat. High on rafters or wires = roof rat
- Nests: Shredded paper in ground-level corners = Norway rat. Material found in upper areas = roof rat
- Sounds: Heavy thumping = Norway rat. Lighter scratching from above = roof rat
- Grease marks: Along baseboards = Norway rat. Along beams and joists = roof rat
Health Risks
Both rat species carry diseases that can affect your family. Here’s what to know.
Norway rats are the main carriers of leptospirosis (spreads through urine in water/soil) and rat-bite fever (from scratches or bites).
Roof rats can spread flea-borne murine typhus. Both species can contaminate food with salmonella through droppings and urine.
Prevention
- Seal all gaps bigger than 1/2 inch around pipes and vents
- Trim plants and branches 18 inches away from your foundation and roof line
- Store pet food and bird seed in metal containers
- Keep yards clean and remove standing water
- Fix leaky pipes and improve drainage near the foundation
For trapping, use snap traps or tamper-resistant bait stations indoors. Avoid loose poison, which can harm pets and wildlife.
Our team has handled rat infestations of every type across the DMV for over 57 years.
Professional Treatment
Our licensed technicians use a four-step rodent protocol:
- 78-point inspection to map hot spots
- Strategic bait station placement with species-specific bait
- Follow-ups at 1 and 3 weeks to check progress
- Tri-annual maintenance (three times per year) to prevent rats from coming back
We serve Old Town through rodent control in Alexandria and nearby areas like Reston.
Related Guides
- Rats vs Mice: Key Differences
- Ultimate Guide to Rodent Control
- How Long Do Rats Live?
- Mice in Your Home
If you need help with a rat problem, call us at 703-683-2000 or email info@bettertermite.com for a free estimate.
