States Wildlife
Menu

Invasive and nonnative animals in New Hampshire

Last checked November 3, 2026 against official sources.

On this page
  1. Feral Swine in New Hampshire
  2. Avoid the itch to touch Browntail Moth caterpillars
  3. Spotted Lanternfly Arrives in New Hampshire: What Farmers Should Know
  4. Invasive Species and climate change
  5. Turtles of New Hampshire
  6. USGS NAS collection info, species 57, New Hampshire
  7. USGS NAS collection info, species 156, New Hampshire
  8. How to report
  9. Sources

8 nonnative animals are named on 7 official lists for New Hampshire: “Feral Swine in New Hampshire” (New Hampshire Fish and Game Department), “Avoid the itch to touch Browntail Moth caterpillars” (NH Department of Natural and Cultural Resources), “Spotted Lanternfly Arrives in New Hampshire: What Farmers Should Know” (UNH Cooperative Extension), “Invasive Species and climate change” (New Hampshire Fish and Game Department), “Turtles of New Hampshire” (New Hampshire Fish and Game Department), “USGS NAS collection info, species 57, New Hampshire” (USGS Nonindigenous Aquatic Species) and “USGS NAS collection info, species 156, New Hampshire” (USGS Nonindigenous Aquatic Species).

To report a sighting, see how to report.

Being on a list of nonnative species does not always mean an animal is harmful or established: each list below is described in its source's terms. A sighting of a listed animal is still worth reporting to the agency.

Feral Swine in New Hampshire

New Hampshire Fish and Game Department, archived copy, captured June 23, 2025. 1 animal.

Avoid the itch to touch Browntail Moth caterpillars

NH Department of Natural and Cultural Resources, archived copy, captured June 26, 2025. 1 animal.

Spotted Lanternfly Arrives in New Hampshire: What Farmers Should Know

UNH Cooperative Extension, September 2026. 1 animal.

Invasive Species and climate change

New Hampshire Fish and Game Department, archived copy, captured August 24, 2025. 2 animals.

Turtles of New Hampshire

New Hampshire Fish and Game Department, archived copy, captured October 14, 2025. 1 animal.

  • Red-eared slider

USGS NAS collection info, species 57, New Hampshire

USGS Nonindigenous Aquatic Species, database queried November 3, 2026. 1 animal.

USGS NAS collection info, species 156, New Hampshire

USGS Nonindigenous Aquatic Species, database queried November 3, 2026. 1 animal.

How to report a sighting in New Hampshire

NH Fish and Game Wildlife Division (603) 271-2461; Law Enforcement (603) 271-3361. Invasive insects: NHBugs reporting form (nhbugs.org/reporting-form). Stranded marine animals: Seacoast Science Center (603) 997-9448 or the Northeast hotline (866) 755-6622. Sharks: Northeast Shark Hotline (401) 859-1043. New Hampshire Fish and Game Department

Do not try to catch or handle the animal. A photo taken from a safe distance, the place and the date help the agency.

Sources

  1. Feral Swine in New Hampshire. New Hampshire Fish and Game Department. archived copy, captured June 23, 2025; checked November 3, 2026.
    Quoted passages (1)
    “A confirmed feral swine population in New Hampshire, primarily in Grafton, Sullivan and Cheshire Counties, presents a unique management challenge.”
  2. Avoid the itch to touch Browntail Moth caterpillars. NH Department of Natural and Cultural Resources. archived copy, captured June 26, 2025; checked November 3, 2026.
    Quoted passages (1)
    “This is the first confirmed incident of the species in the Granite State in 75 years.”
  3. Spotted Lanternfly Arrives in New Hampshire: What Farmers Should Know. UNH Cooperative Extension. September 2026; checked November 3, 2026.
    Quoted passages (1)
    “At this time, there is no evidence of an established population”
  4. USGS NAS collection info, species 57, New Hampshire. USGS Nonindigenous Aquatic Species. database queried November 3, 2026; checked November 3, 2026.
  5. USGS NAS collection info, species 156, New Hampshire. USGS Nonindigenous Aquatic Species. database queried November 3, 2026; checked November 3, 2026.
  6. Invasive Species and climate change. New Hampshire Fish and Game Department. archived copy, captured August 24, 2025; checked November 3, 2026.
    Quoted passages (2)
    “Invasive species can change the face of wildlife habitats and cause significant economic harm, such as the Asian longhorned beetle”
    “An example of an invasive species in New Hampshire is the emerald ash borer, which is killing native ash trees.”
  7. Turtles of New Hampshire. New Hampshire Fish and Game Department. archived copy, captured October 14, 2025; checked November 3, 2026.
    Quoted passages (1)
    “…occasionally a non-native turtle is observed in New Hampshire resulting from released pets, most commonly red-eared sliders.”
  8. Wildlife FAQs. New Hampshire Fish and Game Department. archived copy, captured August 1, 2023; checked November 3, 2026.
    Quoted passages (1)
    “Wildlife Division - (603) 271-2461”