Pennsylvania mammals

Northern Hoary Bat in Pennsylvania

Lasiurus cinereus

Native to Pennsylvania S4 Apparently Secure in Pennsylvania

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

Northern Hoary Bat in Pennsylvania, by the numbers

Occasional in Pennsylvania 50th most recorded of 77 mammals logged in Pennsylvania

15 occurrence records
14 with iNaturalist photos

Records from 2000–2026.

When to look for the Northern Hoary Bat in Pennsylvania

Most sightings fall in July to August.

15 Pennsylvania 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 Pennsylvania records (table)
MonthRecords
January0
February0
March0
April3
May1
June1
July6
August4
September0
October0
November0
December0

Monthly northern hoary bat occurrence records (iNaturalist and GBIF) in Pennsylvania, 2000–2026.

Seasonality

Year-round in Pennsylvania, with recorded sightings peaking in July–August.

Occurrence map

Where Northern Hoary Bat has been recorded in Pennsylvania

15 records mapped · zoom and drag to explore

15 Pennsylvania records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Cook Forest State Park 1

Protected places with the most northern hoary 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 Pennsylvania

CountyRecords
Philadelphia County 3
Montgomery County 3
Luzerne County 1
Clarion County 1
Dauphin County 1
Cambria County 1
Centre County 1
Blair County 1
Monroe County 1
Delaware County 1
Allegheny County 1

The complete county distribution, spread across 11 Pennsylvania counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Pennsylvania’s records for the northern hoary bat cluster at Presque Isle State Park on Lake Erie, Pymatuning’s reservoir-edge woods, and the forested corridor along Delaware Water Gap, the kind of tree cover this solitary, tree-roosting bat favors over caves. Nearly all of the state’s handful of sightings come from iNaturalist rather than museum specimens, unusual for a bat that’s typically heard more than seen, and no Pennsylvania record has been logged between November and March. That gap fits a species known for migrating rather than overwintering in the state.

NatureServe rates it Apparently Secure in Pennsylvania even though it’s considered globally Vulnerable, a reminder that a healthy regional foothold doesn’t guarantee the species is doing well everywhere it roosts.

Occurrence data from iNaturalist.

More mammals in Pennsylvania 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"