Colorado Hairstreak
Look first for purple wings with broad dark margins and orange spots near the hindwing tails, then confirm it in gambel oak woodland and scrub in colorado and the four corners region. Those two clues make Colorado Hairstreak much easier to identify responsibly in Colorado.
Artwork inspired by Vance Kirkland
Colorado hairstreak caterpillars feed on Gambel oak, and adults spend much of their time in the canopy rather than visiting open meadow flowers. Closed wings are pale and cryptic; flashes of purple appear in flight or basking.
Search flowering or sap-producing oaks without beating branches, and leave eggs and larvae attached. Watch sunlit Gambel oak crowns for short purple flights, then wait for the butterfly to settle. Adults are easiest to find from mid-June through August, often high in Gambel oak.
- Status
- Colorado state insect; locally common where host oak persists
- Best clue
- Purple wings with broad dark margins and orange spots near the hindwing tails
- Colorado habitat
- Gambel oak woodland and scrub in Colorado and the Four Corners region
Quick guide
- Search
- Gambel oak crowns on warm summer afternoons
- Wait
- For a settled butterfly instead of chasing canopy flight
A low-impact field sequence for Colorado Hairstreak
- Begin with the host
- Scan mature Gambel oak where adults perch, court, and lay eggs.
- Use the upperwing
- Purple-blue wings with broad dark borders are decisive when the butterfly opens naturally.
- Check the tail
- Small hindwing tails and orange spots help separate it from other purple-toned butterflies.
- Leave it perched
- Use binoculars or a long lens; never bait, chill, collect, or rearrange vegetation.
Good to know
Because adults often remain in oak canopies, a “butterfly garden” strategy can miss them entirely—the host tree is the better search image.
Notice these
- Purple wings with broad dark margins and orange spots near the hindwing tails
- Gambel oak woodland and scrub in Colorado and the Four Corners region
- Colorado state insect; locally common where host oak persists