Bats in Oregon in September
Yes, September is one of the best months to see bats in Oregon. It is the 3rd busiest month of the year, with 152 of the 1,013 sightings logged across the year (15%), 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 July 2, 2026.
Peak month for bats in Oregon
15%
of yearly sightings
152
records in September
#3
busiest month of 12
1,013
verified records a year
August 21.7%, September 15%, October 5%. Busiest month is August at 21.7%.
1,013 verified observations of bats in Oregon, recorded across 12 months of the year on iNaturalist.
When bats are recorded in Oregon
Peak month
August
220 records (21.7% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 20 | 2% |
| February | 28 | 2.8% |
| March | 44 | 4.3% |
| April | 53 | 5.2% |
| May | 119 | 11.7% |
| June | 130 | 12.8% |
| Julypeak | 164 | 16.2% |
| Augustpeak | 220 | 21.7% |
| Septemberpeak | 152 | 15% |
| October | 51 | 5% |
| November | 17 | 1.7% |
| December | 15 | 1.5% |
Bats you are most likely to see
| Species | Verified observations |
|---|---|
| Big Brown Bat | 109 |
| Little Brown Bat | 103 |
| Townsend's Big-eared Bat | 81 |
| Silver-haired Bat | 47 |
| California Myotis | 35 |
| Long-eared Myotis | 31 |
| Northern Hoary Bat | 23 |
| Yuma Myotis | 13 |
In Oregon, September carries 15% of the year's bats sightings, about 6.7 points above an even month-to-month split. That makes it the 3rd busiest of the twelve months, out of 12 months with recorded activity.
Activity is easing off from August (21.7%) into September, and it heads toward October (5%) after. This is right inside the peak window, so September is one of the surest months to plan a trip around.
The bats most often recorded in Oregon are Big Brown Bat, Little Brown Bat and Townsend's Big-eared Bat. Those counts are annual totals rather than a September split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in September itself.
Which bats you are most likely to see
- Big Brown Bat109 records
- Little Brown Bat103 records
- Townsend's Big-eared Bat81 records
- Silver-haired Bat47 records
- California Myotis35 records
- Long-eared Myotis31 records
Plan your bat trip in Oregon
Start with live tours near Crater Lake National Park, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
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Live tours nearbySee live tours near Crater Lake National Park
Use the live GetYourGuide widget to compare local departures and activity styles close to the main bat viewing area.
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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 Oregon in September?+
Yes. September accounts for 152 of the 1,013 verified bats sightings logged in Oregon across the year, which is 15% of the annual total.
Is September a good time to see bats in Oregon?+
September is one of the best months. It ranks 3rd of the year and sits inside the peak window of August, July and September.
What month is best for bats in Oregon?+
August is the single busiest month, with the broader peak running through August, July and September, based on 1,013 verified observations.
Which bats are you most likely to see in Oregon?+
The most-recorded species in Oregon are Big Brown Bat, Little Brown Bat and Townsend's Big-eared Bat, based on all-time iNaturalist counts.
See bats in Oregon in other months
More places to see bats
More wildlife in Oregon