Maryland mammals

Silver-haired Bat in Maryland

Lasionycteris noctivagans

Native to Maryland SU Unrankable in Maryland

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

Silver-haired Bat in Maryland, by the numbers

Occasional in Maryland 38th most recorded of 100 mammals logged in Maryland

35 occurrence records

Records from 2000–2026.

When to look for the Silver-haired Bat in Maryland

Most sightings fall in April.

35 Maryland occurrence records (iNaturalist and GBIF) by month of year, 2000–2026. Shows when the species is recorded, not a guarantee of presence.

Monthly Maryland records (table)
MonthRecords
January3
February3
March4
April8
May3
June2
July0
August0
September1
October4
November6
December1

Monthly silver-haired bat occurrence records (iNaturalist and GBIF) in Maryland, 2000–2026.

Seasonality

Year-round in Maryland, with recorded sightings peaking in April, with a smaller rise in November.

Occurrence map

Where Silver-haired Bat has been recorded in Maryland

35 records mapped · zoom and drag to explore

35 Maryland records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
George Washington Memorial Parkway 1
Catoctin Mountain Park 1
Assateague Island National Seashore 1

Protected places with the most silver-haired bat 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 Maryland

CountyRecords
Montgomery County 11
Baltimore County 11
Worcester County 3
Garrett County 2
Howard County 2
Prince George's County 2
Calvert County 2
Anne Arundel County 1
Frederick County 1

The complete county distribution, spread across 9 Maryland counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Silver-haired bat migrates through Maryland rather than settling into one summer roost, typically traveling alone or in small groups and roosting under loose bark instead of in caves. NatureServe lists the species SU, Unrankable, in Maryland, reflecting genuine uncertainty about its true status rather than just thin data.

Records rise in April and again in November, tracking the species’ spring and fall migration passages through the state on the way to and from its breeding range farther north.

More mammals in Maryland 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"