Is the American dog tick dangerous to kids and pets?

Yes — it can transmit Rocky Mountain spotted fever (RMSF) and tularemia, both serious diseases. Remove any attached tick promptly using the CDC technique and watch for fever, headache, or rash in the days after. RMSF can be severe if untreated — seek medical care early for any post-tick fever. Route all treatment decisions to your doctor; no dosages here (cdc.gov/rocky-mountain-spotted-fever/about/index.html).

Is the American dog tick in New Hampshire?

Yes — it is established and among the most common ticks encountered by NH residents, found in fields, trail edges, and brushy yards across all four Anchor service counties (Rockingham, Hillsborough, Merrimack, Strafford). UNH Cooperative Extension confirms it as one of the state's primary tick species (extension.unh.edu).

Does the American dog tick cause Lyme disease?

No. The American dog tick does not transmit Lyme disease. Lyme is spread by the blacklegged tick (deer tick). Many people assume all ticks carry Lyme, but the American dog tick is not a Lyme vector — it carries RMSF and tularemia instead. For comprehensive Lyme disease information, see /ticks-fleas-faq/ (cdc.gov).

How do I remove an American dog tick?

Use clean fine-tipped tweezers, grasp the tick as close to the skin as possible, and pull upward with steady, even pressure. Do not twist or jerk. Do not use nail polish, petroleum jelly, or heat — these delay correct removal. After removal, clean the bite and your hands with rubbing alcohol or soap and water. Save the tick if symptoms develop (cdc.gov/ticks/after-a-tick-bite).

What is the American dog tick a sign of?

Tick habitat: tall grass, brush, leaf litter, and host animals (deer, dogs, small mammals) in or near your yard or trail. Finding this tick regularly on pets or family members is a signal to assess your property's tick habitat — mowed edges, brush clearance, and a wood-chip barrier at the woods edge are the primary fixes (extension.unh.edu).

When is American dog tick risk highest?

Spring and summer, when adult females are most active and most likely to bite people and pets. Peak activity is roughly May through August in southern NH. Larvae and nymphs are also active in summer but feed primarily on small mammals rather than people. Daily tick checks and repellents are most critical during this window (cdc.gov/ticks/about/where-ticks-live.html).

How is the American dog tick different from the deer tick?

The American dog tick is larger (~5 mm vs ~2–3 mm for a deer-tick nymph) and has ornate white/silver marbling on its back — the deer tick is smaller with dark legs and no marbling. Most importantly, they carry different diseases: the American dog tick carries RMSF and tularemia; the deer tick carries Lyme. Full deer-tick depth at /ticks-fleas-faq/.

What is Rocky Mountain spotted fever?

Rocky Mountain spotted fever (RMSF) is a serious bacterial infection caused by Rickettsia rickettsii, spread by the American dog tick. Symptoms include fever, severe headache, and a characteristic rash that typically appears 2–4 days after fever onset, beginning on the wrists and ankles. RMSF can be fatal without treatment — see a doctor promptly for any tick-related fever or rash (cdc.gov/rocky-mountain-spotted-fever/about/index.html).

American dog tick · Dermacentor variabilis

Ticks & FleasNH resident

American Dog Tick in NH: ID, Disease Risk & Removal

Also called Wood tick

The American dog tick (Dermacentor variabilis) is established and common throughout New Hampshire. It does NOT transmit Lyme disease — that is the deer tick. It does vector Rocky Mountain spotted fever (RMSF) and tularemia, two serious but treatable diseases. The correct removal technique (fine-tipped tweezers, steady upward pull, no twisting or nail polish) is the single most important protective action.

At a glance

NH status: Established and common statewide; extension.unh.edu
Lyme?: No — does NOT spread Lyme disease; Lyme = blacklegged/deer tick; cdc.gov
Diseases: Rocky Mountain spotted fever (RMSF) + tularemia; cdc.gov/ticks/about/where-ticks-live.html
Size: ~5 mm unfed; grape-sized when engorged; adult female; Ixodidae
Peak risk: Spring and summer (adult females); cdc.gov/ticks/about/where-ticks-live.html

The short of it

The common NH tick — and it does not carry Lyme

The American dog tick (Dermacentor variabilis) — also called the wood tick — is established and common throughout New Hampshire, found wherever there is tall grass, brush, or trail edges. It is the tick most NH residents encounter in their yards and on their dogs in spring and summer. Its ornate white-and-silver marbling on the back makes it easy to distinguish from the smaller, darker deer tick.

The most important thing to know: the American dog tick does NOT transmit Lyme disease. Lyme is the deer tick's domain; for Lyme depth see /ticks-fleas-faq/. The dog tick does vector Rocky Mountain spotted fever (RMSF) and tularemia — both serious, but both treatable with prompt medical attention. The most protective action any NH resident can take is knowing the correct CDC tick-removal technique: fine-tipped tweezers, grasp close to the skin, steady upward pull, no twisting or folk remedies.

Identify it

How to identify an American dog tick

The American dog tick's ornate white-and-silver marbling on the scutum (the plate behind the head) is the single best ID feature — no other common NH tick has it. It is larger than the deer tick and has short, blunt mouthparts. A marbled tick on a dog or person after outdoor activity in spring or summer is almost certainly this species.

Species profile

American dog tick

Scientific name: Dermacentor variabilis
Family: Ixodidae
Size: Adult female ~5 mm unfed; grape-sized when engorged
Coloration: Brown with ornate white/silver markings on the scutum; brown legs
Habitat: Grassy fields, trail edges, brush, shrubby areas
Active season: Spring through late summer; adults peak May–August
Diet: Blood — rodents as larvae/nymphs; dogs and humans as adults
Reproduction: Female lays several thousand eggs after a blood meal
Lifespan: Multi-stage; up to ~2 years

East of the Rocky Mountains; established throughout New Hampshire

The tells — key ID features

Ornate white/silver marbling on the back (scutum) — the single best visual ID feature; no other common NH tick has this pattern
Larger than the deer tick — unfed adult about the size of a small watermelon seed (~5 mm)
Short, blunt mouthparts and a roughly rectangular capitulum (head base)
Brown legs; body engorges to grape-size when fully fed
Found questing on tall grass and trail edges in spring and summer, not typically climbing walls or ceilings

Size, to scale

The insect

Unfed adult ~5 mm

Compared to

A small watermelon seed; engorged female swells to grape-sized

Looks bigger than it is

Noticeably bigger and more 'marbled' than the tiny Lyme-carrying deer tick — and it is not a Lyme vector.

Is it actually this? — the confusion species

Blacklegged tick (deer tick)

How to tell — The deer tick is smaller (~2–3 mm), has dark legs and no ornate marbling — and is the Lyme vector. Full deer-tick depth at /ticks-fleas-faq/.

Lone star tick

How to tell — The lone star tick has a single white dot on the female's back and longer mouthparts; it lacks the ornate all-over marbling of the American dog tick.

Brown dog tick

How to tell — The brown dog tick is plain reddish-brown with no marbling; tends to climb walls and ceilings indoors and is uncommon in NH.

What you'll notice

Signs of a problem

The American dog tick quests actively in tick season. These are the signs of activity on your property or pet.

Ticks found questing on tall grass or shrubs along a trail edge in late spring or summer

What it means — American dog tick habitat — peak adult activity season (May–August) in exactly this microhabitat.

A marbled (white-and-brown) tick on a dog or family member after outdoor activity

What it means — American dog tick — confirm the ornate marbling and remove promptly using the CDC technique.

An engorged, grape-sized tick on a pet

What it means — A fed adult female American dog tick; remove carefully and monitor both the pet and the bitten person for fever or rash in the following days.

Multiple ticks found on dogs or people after walking through a brushy or unmowed area

What it means — High tick density — consider perimeter tick treatment and daily full-body checks after outdoor time.

How much it matters

The real risks, calibrated

The American dog tick does not spread Lyme disease. It carries two other serious diseases NH residents should know about.

Overall risk

High

Rocky Mountain spotted fever (RMSF)

Severe

Onset: Fever and headache typically 2–14 days after bite; rash appears 2–4 days after fever onset (wrists/ankles first, spreading)

Serious and potentially fatal if untreated; curable with prompt medical treatment. See a doctor for any fever or rash after a tick bite — do not wait. Route to your doctor and NH DHHS; no dosages here.

Tularemia

Moderate

Onset: Symptoms typically 3–5 days after tick exposure

Fever, skin ulcer at the bite site, swollen lymph nodes; treatable with antibiotics with prompt diagnosis. See a doctor for any post-tick symptoms.

What you can do

DIY — what works, what backfires

The most important DIY action with any tick is correct removal. Here is the CDC-recommended technique — and the mistakes that make things worse.

What actually works

Use clean fine-tipped tweezers and grasp the tick as close to the skin's surface as possible.
Pull upward with steady, even pressure — do not twist or jerk.
After removal, clean the bite area and your hands with rubbing alcohol or soap and water.
Save the tick in a sealed bag or container for identification if symptoms develop.
Perform daily full-body tick checks on yourself, children, and pets after outdoor activity — pay particular attention to behind the ears, hairline, underarms, groin, and between the toes.

What backfires

Do not twist or jerk the tick during removal — this may cause the mouthparts to break off in the skin.
Do not use nail polish, petroleum jelly, heat (matches), or any folk remedy — these methods do not work and delay correct removal.
Do not crush the tick with your fingers; dispose of it by sealing in a bag, submerging in alcohol, or flushing.
Do not assume a tick is safe because it was attached briefly — RMSF transmission can occur with shorter attachment times than Lyme disease.

Local Context

American dog tick in New Hampshire

The American dog tick is established and among the most common ticks encountered by NH residents, particularly in fields, trail edges, and brushy yards across Rockingham, Hillsborough, Merrimack, and Strafford counties. Adults peak roughly May through August. Manchester, Nashua, Concord, and surrounding communities all have active populations in appropriate habitat.

Peak season

Spring through late summer; adult females most active May–August

You might actually have

Blacklegged tick (deer tick) — the Lyme vector; see /ticks-fleas-faq/
Lone star tick — range-expanding, established Merrimack County only
Brown dog tick — uncommon; can breed indoors

We serve these communities

ManchesterNashuaConcordDerryBedfordSalemHudsonAuburnGoffstownHooksett

Rockingham · Hillsborough · Merrimack · Strafford Counties

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Family-owned since 2017

Service Area Map

Southern New Hampshire

When it's past DIY

When to call a pro for American dog tick control

Yard tick treatment combined with habitat modification can significantly reduce American dog tick populations on your property. Anchor's Tick Control service targets the tick's preferred questing habitat — grass edges, brush, and transition zones — for seasonal protection across southern NH.

Signals it's past DIY

When to call a pro

Ticks are consistently found on family members or pets after time in the yard.
Your property has brushy edges, tall grass, or wooded borders that create high-density tick habitat.
You want seasonal perimeter treatment before peak adult activity in spring.

Keep them out — prevention

NH-specific

Keep grass mowed and brush cut back

American dog ticks quest from tall grass and brush edges. Mow regularly and trim shrubs, especially at the boundary between lawn and woods or unmowed areas.

Create a wood-chip barrier at the woods edge

A 3-foot-wide strip of wood chips or gravel between the lawn and a wooded border creates a dry, exposed zone that ticks avoid crossing.

Use EPA-registered tick repellents

Apply DEET to exposed skin and permethrin to clothing and gear for outdoor activity in tick habitat. Follow label directions for all repellents.

Daily tick checks

After any outdoor activity in potential tick habitat, check the whole body — especially behind the ears, hairline, underarms, groin, and behind the knees — on yourself, children, and pets.

Not sure it's a american dog tick?

A licensed NH technician can confirm the species and tell you honestly whether it's a DIY fix or a job for a pro — free inspection, same-day service across Southern New Hampshire.

Get a Free Inspection (603) 785-0118

Common Questions

Frequently asked questions

Sources(6)

[1]
CDC — Where Ticks Live
RMSF and tularemia vectors; spring/summer peak; adult females bite humans
govverified 2026-06-30
[2]
CDC — Rocky Mountain Spotted Fever
RMSF symptoms, onset, severity, treatability
govverified 2026-06-30
[3]
CDC — After a Tick Bite
correct CDC tick removal technique; dos and don'ts
govverified 2026-06-30
[4]
UNH Cooperative Extension — Biology and Management of Ticks in NH
established and common NH species; local habitat context
extensionverified 2026-06-30
[5]
CDC — Tularemia Clinical Signs
tularemia symptoms; tick as vector
govverified 2026-06-30
[6]
Tick Free NH / NHDAMF
NH tick identification; state surveillance program
govverified 2026-06-30

Written & reviewed by

Verified

Daniel Brady

NH-Licensed Pesticide Applicator · License #782664 (NHDAMF, RSA 430)

Daniel Brady is the New Hampshire–licensed applicator behind Anchor Pest Services, a family-owned pest control company serving the Manchester area since 2017.

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Last updated 2026-06-30

New Hampshire pest control

Dealing with american dog ticks in your home?

Anchor Pest Services identifies and handles american dog tick problems across southern and central New Hampshire. Family-owned since 2017, NH license #782664.