Dusky-blue Groundstreak (Calycopis isobeon) is in the Gossamer-winged Butterflies family (Lycaenidae). Across the U.S., iNaturalist users have logged 3,742 research-grade observations of it in our sample, peaking in October.
Seasonal pattern in the national data: seasonal. Counts also reflect when people are out photographing, so compare months within a state rather than across states.
When to photograph Dusky-blue Groundstreak: observations by month (U.S.)
About Dusky-blue Groundstreak
Calycopis isobeon, the dusky-blue groundstreak, is a butterfly native to the Americas, ranging from Venezuela to central Texas. It is very similar to the red-banded hairstreak (Calycopis cecrops) and the two are sometimes treated as conspecific.From Wikipedia via iNaturalist — article, CC BY-SA.
Dusky-blue Groundstreak by state
| State | Observations | Peak month | Main season |
|---|---|---|---|
| Texas | 3,708 | October | Oct–Dec |
| Louisiana | 33 | October | Sep–Nov |
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 Dusky-blue Groundstreak?
Nationally, October has the most observations, with the main season from October to December.
Where is Dusky-blue Groundstreak most often seen?
The most observations come from Texas, Louisiana.