
Tri-coloured Bat (Perimyotis subflavus) is in the Evening Bats family (Vespertilionidae). Across the U.S., iNaturalist users have logged 2,818 research-grade observations of it in our sample, peaking in March.
Seasonal pattern in the national data: spring and fall migrant. Counts also reflect when people are out photographing, so compare months within a state rather than across states.
Conservation status (iNaturalist): VU.
When to photograph Tri-coloured Bat: observations by month (U.S.)
About Tri-coloured Bat
Formerly known as the eastern pipistrelle, technically an inaccurate classification, the new more descriptive common name tricolored bat (Perimyotis subflavus) was chosen because of the distinct tricoloration of each hair, which is black at the base, yellow in the middle and brown at the tips. This species of bat is widely distributed throughout the eastern parts of America and Canada, ranging west until Kansas, Oklahoma, and Texas, from Honduras up north until southern Ontario. It is...From Wikipedia via iNaturalist — article, CC BY-SA.
Tri-coloured Bat by state
| State | Observations | Peak month | Main season |
|---|---|---|---|
| Texas | 504 | March | Jul–May |
| Alabama | 349 | February | Jan–Apr |
| Tennessee | 218 | March | Feb–Apr |
| Oklahoma | 203 | April | Feb–Apr |
| Kentucky | 201 | March | Jan–May |
| Florida | 195 | March | Aug–Apr |
| Mississippi | 138 | January | Jan–Jan |
| Virginia | 132 | April | Feb–May |
| Georgia | 129 | March | Feb–Apr |
| Missouri | 120 | March | Mar–Apr |
| Arkansas | 118 | March | Mar–Apr |
| North Carolina | 106 | April | Mar–Apr |
| Ohio | 54 | August | Mar–Sep |
| South Carolina | 54 | March | Feb–Apr |
| Illinois | 44 | February | Feb–Apr |
| West Virginia | 42 | March | Feb–May |
| Indiana | 37 | April | Feb–May |
| Pennsylvania | 37 | February | Feb–May |
| New York | 23 | May | Apr–May |
| Louisiana | 18 | January | Nov–Jan |
| Maryland | 18 | April | Mar–May |
| Minnesota | 14 | June | Oct–Jul |
| Iowa | 10 | March | Mar–May |
| Wisconsin | 10 | October | Oct–Oct |
| Kansas | 8 | March | Mar–Apr |
| Massachusetts | 8 | April | Apr–May |
| New Jersey | 8 | May | Mar–Jun |
| Vermont | 8 | February | Feb–Feb |
Main season = months with at least 30% of the state's peak-month count.
Related mammals (Evening Bats)
Photography tips
- Keep a legal and safe distance: 100 yards from bears and wolves and 25 yards from other large animals in national parks.
- Dawn and dusk are peak activity times for most mammals.
- Use your car as a blind on wildlife drives.
FAQ
When is the best time to photograph Tri-coloured Bat?
Nationally, March has the most observations, with the main season from September to May.
Where is Tri-coloured Bat most often seen?
The most observations come from Texas, Alabama, Tennessee.



