Vermont mammals

Southern Bog Lemming in Vermont

Synaptomys cooperi

Native to Vermont S2 Imperiled in Vermont

Not listed as nonindigenous in Vermont by USGS NAS; native to its Vermont range.

IUCN Red List status

  1. LC
  2. NT
  3. VU
  4. EN
  5. CR
  6. EW
  7. EX

LC – Least Concern

Widespread and abundant; not at risk.

Southern Bog Lemming in Vermont, by the numbers

Rare in Vermont 55th most recorded of 65 mammals logged in Vermont

16 occurrence records
3 with iNaturalist photos
Aug 4, 2019 Last seen in Vermont

Records from 2000–2026.

16 total records count every Vermont occurrence from GBIF and iNaturalist; the monthly chart covers the 13 records with a full observation date.

When to look for the Southern Bog Lemming in Vermont

Most sightings fall in August.

13 Vermont occurrence records (iNaturalist and GBIF) by month of year, 2000–2026. Shows when the species is recorded, not a guarantee of presence. Based on a small number of dated records; the seasonal pattern may not be representative.

Monthly Vermont records (table)
MonthRecords
January0
February0
March0
April0
May0
June0
July2
August5
September2
October3
November1
December0

Monthly southern bog lemming occurrence records (iNaturalist and GBIF) in Vermont, 2000–2026.

Seasonality

Year-round in Vermont, with recorded sightings peaking in August, with a smaller rise in October.

Occurrence map

Where Southern Bog Lemming has been recorded in Vermont

16 records mapped · zoom and drag to explore

16 Vermont records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Aitken State Forest 3
Green Mountain National Forest 1

Protected places with the most southern bog lemming sightings, from the USGS Protected Areas Database plus named mountain ranges, good spots to look, not a full breakdown, so they don't sum to the total.

Where it's recorded in Vermont

CountyRecords
Rutland County 12
Addison County 4

The complete county distribution, spread across 2 Vermont counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Vermont’s few southern bog lemming records come from the Champlain Valley, where the wetlands around Missisquoi National Wildlife Refuge and the marshy edges of Lake Champlain hold the sedge beds and wet meadow cover this rodent depends on. Despite the name, it isn’t limited to true bogs, but it does need thick, damp grass and sedge, and the refuge’s marshes are about as good a match as Vermont offers.

It’s a stocky, short-tailed rodent that cuts hidden runways through grass and sedge rather than moving across open ground, building round nests from the same plants it clips. Sedges, grasses, mosses, and roots make up most of its diet, with a smaller share of insects mixed in.

Vermont’s records are sparse, just 16 so far, and cluster from midsummer into fall. Because this lemming stays hidden beneath thick cover and is easy to miss without trapping, that pattern likely reflects when and where people looked rather than a real seasonal gap.

Occurrence data from iNaturalist and GBIF.

More mammals in Vermont in the atlas

Data & sources

The data and visualizations on this page draw on these open sources:

  • GBIFCC-BY 4.0occurrence records behind the range map, elevation, and record counts
  • iNaturalistCC0 / CC-BY / CC-BY-SAobservations, photos, and audio recordings
  • NatureServe ExplorerCC-BYthe state conservation rank
  • IUCN Red Listattributed factthe global conservation status
  • USGS NASpublic domainnative / introduced status
  • Natural Earthpublic domainthe relief basemap
  • USFSpublic domainnational-forest boundaries
  • USGS Protected Areas Databasepublic domainthe named parks, forests, and refuges behind "notable places to look"