Ants in New Hampshire

The 12 ant species NH homeowners actually encounter, plus 4 species NOT established here. NH-specific ID, urgency ratings, and treatment advice.

Large black ants in NH homes are almost always carpenter ants or Formica field ants. The thorax-profile test resolves which species in 10 seconds.

Carpenter ant frass = coarse pencil-shaving sawdust + visible insect parts. Tell it apart from termite pellets, beetle dust, and sawdust (NH data).

6 tiny ant species in NH homes under 4mm. The pharaoh vs thief antenna test (3-seg vs 2-seg club) is the critical ID — wrong species = wrong treatment.

Carpenter ants are 3–5× larger than common NH black ants with a distinctive single-curved thorax. The 10-second test tells you which species.

Terro T300 uses borax in a sweet liquid — comparatively low-toxicity, but a chewed-open station exposes more than ants ever remove. Honest safety guide.

Amdro Fire Ant Bait Granules use hydramethylnon — low mammalian toxicity, but corn-grit granules on turf can look like kibble to a grazing dog. Full guide.

Advion Ant Gel Bait uses low-concentration indoxacarb spread across many trail placements. Low-risk per dab, but every spot must stay out of pet reach.

Hot Shot's Ant & Roach Plus Germ Killer pairs a pyrethroid with a quat disinfectant, adding irritation risk for cats. Honest, vet-sourced pet safety guide.

Spectracide Ant Shield granules use lambda-cyhalothrin, a pyrethroid — not a stomach-poison bait. Avoid for cats until watered in and dry. Full breakdown.

Ants don't die in winter. Outdoor colonies drop below the frost line and wait it out — but an ant on your counter in January means the nest is already indoors.

Odorous house ants forage for sugary food and nest in moist, shaded spots near a foundation. Food and moisture explain it — the same as most ants, nothing more.

Acrobat ants aren't pulled in by anything unusual — they forage for food and honeydew, then nest in already-damp wood. Food and moisture are the whole story.

Pavement ants nest in soil under slabs, driveways, and foundation cracks and forage for food and moisture indoors. It's the same ordinary reasons as most ants.

Carpenter ants don't eat your house — they move into wood a leak already softened. A satellite nest indoors is really a sign of a moisture problem outside it.

Advion Ant Gel works on placement discipline: many small dots at harborage, never sprayed near. The correct technique and an honest efficacy verdict.

Amdro Fire Ant Bait is a genuine workhorse where fire ants live -- but fire ants barely exist in NH. Correct technique, honest verdict, NH-right alternatives.

Terro T300 works when you place it on the trail and let ants feed undisturbed. The honest technique, timeline, and where borax bait genuinely fails.

Ant Shield Granules are a contact insecticide, not a bait — broadcast, then water in. Here's the correct technique and why it can't reach a colony.

Terro's T600 is a dust, not a spray. A thin, barely-visible film in dry cracks and voids beats a mounded pile — here's correct technique and an honest verdict.