Dainty Sulphur (Nathalis iole) is in the Whites, Yellows, and Sulphurs family (Pieridae). Across the U.S., iNaturalist users have logged 25,483 research-grade observations of it in our sample, peaking in October.
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.
When to photograph Dainty Sulphur: observations by month (U.S.)
About Dainty Sulphur
Nathalis iole, the dainty sulphur or dwarf yellow, is a North American butterfly in the family Pieridae.From Wikipedia via iNaturalist — article, CC BY-SA.
Dainty Sulphur by state
| State | Observations | Peak month | Main season |
|---|---|---|---|
| Texas | 12,784 | April | Mar–Jun |
| Florida | 3,246 | April | Mar–Jul |
| Arizona | 2,760 | October | Aug–Dec |
| Oklahoma | 1,142 | October | Apr–Oct |
| California | 1,105 | September | Sep–Oct |
| Colorado | 1,052 | October | Jul–Oct |
| New Mexico | 962 | October | Apr–Nov |
| Arkansas | 552 | October | Aug–Nov |
| Missouri | 411 | September | Jul–Nov |
| Kansas | 318 | September | Jul–Oct |
| Nebraska | 165 | September | Jul–Oct |
| Illinois | 138 | October | Aug–Oct |
| Tennessee | 126 | October | Aug–Nov |
| Louisiana | 111 | October | Sep–Nov |
| Nevada | 66 | April | Apr–Jul |
| Ohio | 65 | September | Jul–Oct |
| Iowa | 64 | October | Jul–Oct |
| Minnesota | 58 | September | Aug–Sep |
| Utah | 58 | June | Apr–Jul |
| Alabama | 57 | October | Sep–Nov |
| Mississippi | 51 | September | Aug–Nov |
| Georgia | 46 | October | Aug–Nov |
| Wisconsin | 39 | September | Sep–Sep |
| South Dakota | 27 | October | Aug–Oct |
| Kentucky | 18 | September | Sep–Sep |
| Indiana | 17 | September | Aug–Oct |
| Michigan | 9 | September | Sep–Sep |
| Virginia | 8 | October | Oct–Oct |
| Wyoming | 7 | October | Aug–Nov |
| Maryland | 6 | September | Aug–Oct |
| North Carolina | 5 | July | Jul–Oct |
Main season = months with at least 30% of the state's peak-month count.
Related butterflies (Whites, Yellows, and Sulphurs)
Small White
Orange Sulphur
Cloudless Sulphur
Sleepy Orange
Checkered White
Little Yellow
Clouded Sulphur
Southern Dogface
Photography tips
- Butterflies are sluggish on cool mornings — the best time for close approaches.
- Keep the sensor parallel to the wings for edge-to-edge sharpness.
- Nectar plants in bloom are reliable places to wait.
FAQ
When is the best time to photograph Dainty Sulphur?
Nationally, October has the most observations, with the main season from March to November.
Where is Dainty Sulphur most often seen?
The most observations come from Texas, Florida, Arizona.