Cassius Blue (Leptotes cassius) is in the Gossamer-winged Butterflies family (Lycaenidae). Across the U.S., iNaturalist users have logged 5,060 research-grade observations of it in our sample, peaking in November.
Seasonal pattern in the national data: year-round resident. Counts also reflect when people are out photographing, so compare months within a state rather than across states.
When to photograph Cassius Blue: observations by month (U.S.)
About Cassius Blue
Leptotes cassius, the Cassius blue or tropical striped blue, is a butterfly of the Lycaenidae family. It is found in North America in Florida including the Keys, Texas south through the Caribbean, Mexico, and Central America to South America. Strays can be found in New Mexico, Kansas, Missouri and South Carolina.From Wikipedia via iNaturalist — article, CC BY-SA.
Cassius Blue by state
| State | Observations | Peak month | Main season |
|---|---|---|---|
| Florida | 3,681 | April | Mar–Dec |
| Texas | 1,232 | November | Oct–Dec |
| Georgia | 75 | August | Aug–Nov |
| South Carolina | 43 | September | Aug–Nov |
| Ohio | 9 | October | Oct–Oct |
| North Carolina | 8 | September | Sep–Sep |
| Alabama | 5 | August | Aug–Aug |
Main season = months with at least 30% of the state's peak-month count.
Related butterflies (Gossamer-winged Butterflies)
Gray Hairstreak
Eastern Tailed-Blue
Red-banded Hairstreak
Marine Blue
Ceraunus Blue
Summer Azure
Western Pygmy-Blue
Reakirt's Blue
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 Cassius Blue?
Nationally, November has the most observations, with the main season from March to January.
Where is Cassius Blue most often seen?
The most observations come from Florida, Texas, Georgia.