Bats in Maine in May
Yes, May is one of the best months to see bats in Maine. It is the 3rd busiest month of the year, with 24 of the 164 sightings logged across the year (14.6%), 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.
Peak month for bats in Maine
14.6%
of yearly sightings
24
records in May
#3
busiest month of 12
164
verified records a year
April 6.1%, May 14.6%, June 11%. Busiest month is August at 22.6%.
164 verified observations of bats in Maine, recorded across 12 months of the year on iNaturalist.
When bats are recorded in Maine
Peak month
August
37 records (22.6% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 3 | 1.8% |
| February | 1 | 0.6% |
| March | 8 | 4.9% |
| April | 10 | 6.1% |
| Maypeak | 24 | 14.6% |
| June | 18 | 11% |
| Julypeak | 29 | 17.7% |
| Augustpeak | 37 | 22.6% |
| September | 21 | 12.8% |
| October | 7 | 4.3% |
| November | 5 | 3% |
| December | 1 | 0.6% |
Bats you are most likely to see
| Species | Verified observations |
|---|---|
| Big Brown Bat | 67 |
| Little Brown Bat | 15 |
| Eastern Red Bat | 11 |
| Silver-haired Bat | 7 |
| Eastern Small-footed Myotis | 3 |
| Northern Hoary Bat | 2 |
In Maine, May carries 14.6% of the year's bats sightings, about 6.3 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 rising from April (6.1%) into May, and it heads toward June (11%) after. This is right inside the peak window, so May is one of the surest months to plan a trip around.
The bats most often recorded in Maine are Big Brown Bat, Little Brown Bat and Eastern Red Bat. Those counts are annual totals rather than a May split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in May itself.
Which bats you are most likely to see
- Big Brown Bat67 records
- Little Brown Bat15 records
- Eastern Red Bat11 records
- Silver-haired Bat7 records
- Eastern Small-footed Myotis3 records
- Northern Hoary Bat2 records
Plan your bat trip in Maine
Start with live tours near Acadia National Park, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
GetYourGuide
Live tours nearbySee live tours near Acadia National Park
Use the live GetYourGuide widget to compare local departures and activity styles close to the main bat viewing area.
Booking.com
Stay nearbyStay near Acadia National Park
Compare hotels, cabins and lodges close to the best bat viewing area in Maine.
Viator
Broader backupBook a bat tour in Maine
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 Maine in May?+
Yes. May accounts for 24 of the 164 verified bats sightings logged in Maine across the year, which is 14.6% of the annual total.
Is May a good time to see bats in Maine?+
May is one of the best months. It ranks 3rd of the year and sits inside the peak window of August, July and May.
What month is best for bats in Maine?+
August is the single busiest month, with the broader peak running through August, July and May, based on 164 verified observations.
Which bats are you most likely to see in Maine?+
The most-recorded species in Maine are Big Brown Bat, Little Brown Bat and Eastern Red Bat, based on all-time iNaturalist counts.
See bats in Maine in other months
More places to see bats
More wildlife in Maine