Beavers in Illinois in May
Yes, May is one of the best months to see beavers in Illinois. It is the 3rd busiest month of the year, with 219 of the 1,560 sightings logged across the year (14%), 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 beavers in Illinois
14%
of yearly sightings
219
records in May
#3
busiest month of 12
1,560
verified records a year
April 19.5%, May 14%, June 7.9%. Busiest month is April at 19.5%.
1,560 verified observations of beavers in Illinois, recorded across 12 months of the year on iNaturalist.
When beavers are recorded in Illinois
Peak month
April
304 records (19.5% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 108 | 6.9% |
| February | 82 | 5.3% |
| Marchpeak | 237 | 15.2% |
| Aprilpeak | 304 | 19.5% |
| Maypeak | 219 | 14% |
| June | 123 | 7.9% |
| July | 54 | 3.5% |
| August | 65 | 4.2% |
| September | 50 | 3.2% |
| October | 87 | 5.6% |
| November | 105 | 6.7% |
| December | 126 | 8.1% |
Beavers you are most likely to see
| Species | Verified observations |
|---|---|
| American Beaver | 1,560 |
In Illinois, May carries 14% of the year's beavers sightings, about 5.7 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 April (19.5%) into May, and it heads toward June (7.9%) after. This is right inside the peak window, so May is one of the surest months to plan a trip around.
The beavers most often recorded in Illinois are American Beaver. 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 beavers you are most likely to see
- American Beaver1,560 records
Plan your beaver trip in Illinois
Start with live tours near Lewis & Clark 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 Lewis & Clark National Historic Trail
Use the live GetYourGuide widget to compare local departures and activity styles close to the main beaver viewing area.
Booking.com
Stay nearbyStay near Lewis & Clark National Historic Trail
Compare hotels, cabins and lodges close to the best beaver viewing area in Illinois.
Viator
Broader backupBook a beaver tour in Illinois
Compare guided wildlife tours, boat trips and nature experiences if you want a second travel network beyond the live widget.
Frequently asked questions
Can you see beavers in Illinois in May?+
Yes. May accounts for 219 of the 1,560 verified beavers sightings logged in Illinois across the year, which is 14% of the annual total.
Is May a good time to see beavers in Illinois?+
May is one of the best months. It ranks 3rd of the year and sits inside the peak window of April, March and May.
What month is best for beavers in Illinois?+
April is the single busiest month, with the broader peak running through April, March and May, based on 1,560 verified observations.
Which beavers are you most likely to see in Illinois?+
The most-recorded species in Illinois are American Beaver, based on all-time iNaturalist counts.
See beavers in Illinois in other months
More wildlife in Illinois