Bats in Pennsylvania in October
Yes, October is a good month to see bats in Pennsylvania. It is the 7th busiest month of the year, with 109 of the 1,334 sightings logged across the year (8.2%), based on verified iNaturalist records.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
Good month for bats in Pennsylvania
8.2%
of yearly sightings
109
records in October
#7
busiest month of 12
1,334
verified records a year
September 8.2%, October 8.2%, November 4.7%. Busiest month is August at 16%.
1,334 verified observations of bats in Pennsylvania, recorded across 12 months of the year on iNaturalist.
When bats are recorded in Pennsylvania
Peak month
August
213 records (16% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 29 | 2.2% |
| February | 39 | 2.9% |
| March | 67 | 5% |
| April | 143 | 10.7% |
| May | 153 | 11.5% |
| Junepeak | 171 | 12.8% |
| Julypeak | 206 | 15.4% |
| Augustpeak | 213 | 16% |
| September | 109 | 8.2% |
| October | 109 | 8.2% |
| November | 63 | 4.7% |
| December | 32 | 2.4% |
Bats you are most likely to see
| Species | Verified observations |
|---|---|
| Big Brown Bat | 577 |
| Eastern Red Bat | 181 |
| Silver-haired Bat | 61 |
| Little Brown Bat | 51 |
| Tri-coloured Bat | 43 |
| Northern Hoary Bat | 21 |
| Northern Myotis | 13 |
| Eastern Small-footed Myotis | 9 |
In Pennsylvania, October carries 8.2% of the year's bats sightings, about 0.1 points below an even month-to-month split. That makes it the 7th busiest of the twelve months, out of 12 months with recorded activity.
Activity holds steady between September and October, and it heads toward November (4.7%) after. The busiest month is August (16%), so if timing is flexible, that window is the safer bet.
The bats most often recorded in Pennsylvania are Big Brown Bat, Eastern Red Bat and Silver-haired Bat. Those counts are annual totals rather than a October split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in October itself.
Which bats you are most likely to see
- Big Brown Bat577 records
- Eastern Red Bat181 records
- Silver-haired Bat61 records
- Little Brown Bat51 records
- Tri-coloured Bat43 records
- Northern Hoary Bat21 records
Plan your bat trip in Pennsylvania
Start with live tours near Appalachian National Scenic Trail, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
GetYourGuide
Live tours nearbySee live tours near Appalachian National Scenic Trail
Use the live GetYourGuide widget to compare local departures and activity styles close to the main bat viewing area.
Booking.com
Stay nearbyStay near Appalachian National Scenic Trail
Compare hotels, cabins and lodges close to the best bat viewing area in Pennsylvania.
Viator
Broader backupBook a bat tour in Pennsylvania
Compare guided wildlife tours, boat trips and nature experiences if you want a second travel network beyond the live widget.
Gear to see them
Frequently asked questions
Can you see bats in Pennsylvania in October?+
Yes. October accounts for 109 of the 1,334 verified bats sightings logged in Pennsylvania across the year, which is 8.2% of the annual total.
Is October a good time to see bats in Pennsylvania?+
October is the 7th busiest month. It is workable, though August and July is the stronger window for a reliable sighting.
What month is best for bats in Pennsylvania?+
August is the single busiest month, with the broader peak running through August, July and June, based on 1,334 verified observations.
Which bats are you most likely to see in Pennsylvania?+
The most-recorded species in Pennsylvania are Big Brown Bat, Eastern Red Bat and Silver-haired Bat, based on all-time iNaturalist counts.
See bats in Pennsylvania in other months
More places to see bats
More wildlife in Pennsylvania