Bats in Delaware in May
Yes, May is a good month to see bats in Delaware. It is the 5th busiest month of the year, with 10 of the 86 sightings logged across the year (11.6%), 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.
Good month for bats in Delaware
11.6%
of yearly sightings
10
records in May
#5
busiest month of 12
86
verified records a year
April 14%, May 11.6%, June 12.8%. Busiest month is April at 14%.
86 verified observations of bats in Delaware, recorded across 12 months of the year on iNaturalist.
When bats are recorded in Delaware
Peak month
April
12 records (14% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 5 | 5.8% |
| February | 3 | 3.5% |
| March | 2 | 2.3% |
| Aprilpeak | 12 | 14% |
| May | 10 | 11.6% |
| Junepeak | 11 | 12.8% |
| Julypeak | 12 | 14% |
| August | 11 | 12.8% |
| September | 6 | 7% |
| October | 6 | 7% |
| November | 7 | 8.1% |
| December | 1 | 1.2% |
Bats you are most likely to see
| Species | Verified observations |
|---|---|
| Eastern Red Bat | 30 |
| Big Brown Bat | 20 |
| Silver-haired Bat | 6 |
| Mouse-eared Bats | 1 |
In Delaware, May carries 11.6% of the year's bats sightings, about 3.3 points above an even month-to-month split. That makes it the 5th busiest of the twelve months, out of 12 months with recorded activity.
Activity is easing off from April (14%) into May, and it heads toward June (12.8%) after. The busiest month is April (14%), so if timing is flexible, that window is the safer bet.
The bats most often recorded in Delaware are Eastern Red Bat, Big Brown Bat and Silver-haired 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
- Eastern Red Bat30 records
- Big Brown Bat20 records
- Silver-haired Bat6 records
- Mouse-eared Bats1 records
Plan your bat trip in Delaware
Start with live tours near Captain John Smith Chesapeake National Historic Trail, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
GetYourGuide
Live tours nearbySee live tours near Captain John Smith Chesapeake National Historic 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 Captain John Smith Chesapeake National Historic Trail
Compare hotels, cabins and lodges close to the best bat viewing area in Delaware.
Viator
Broader backupBook a bat tour in Delaware
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 Delaware in May?+
Yes. May accounts for 10 of the 86 verified bats sightings logged in Delaware across the year, which is 11.6% of the annual total.
Is May a good time to see bats in Delaware?+
May is the 5th busiest month. It is workable, though April and July is the stronger window for a reliable sighting.
What month is best for bats in Delaware?+
April is the single busiest month, with the broader peak running through April, July and June, based on 86 verified observations.
Which bats are you most likely to see in Delaware?+
The most-recorded species in Delaware are Eastern Red Bat, Big Brown Bat and Silver-haired Bat, based on all-time iNaturalist counts.
See bats in Delaware in other months
More places to see bats
More wildlife in Delaware