Sandia Hairstreak
New Mexico’s state butterfly spends most of its life hidden on beargrass, emerging for a short spring flight as a remarkably camouflaged green hairstreak.
Artwork inspired by Emil Bisttram
Sandia hairstreak larvae feed on Texas sacahuista, also called beargrass, and the insect’s distribution follows scattered stands of that plant across the Southwest. The green underside blends with fresh vegetation, while brown upper wings disappear when the butterfly closes or shifts angle.
Adults may be abundant in one canyon and absent from another apparently similar slope because host plants, exposure, moisture, and local history differ. Search by learning the plant first, then wait near blooms and perch sites rather than trampling through dense clumps.
- Role
- New Mexico state butterfly
- Host
- Texas sacahuista
- Flight
- Brief spring season
Quick guide
- Find the plant
- Learn Texas sacahuista’s dense fountain of narrow…
- Time spring
- Visit on a sunny
Confirm Sandia Hairstreak in habitat
- First mark
- Look for small hairstreak with green below, brown above, fine white markings, and short tails when identifying Sandia Hairstreak.
- Confirm
- Check green underwings together with visit on a sunny before accepting the identification.
- Where to search
- Rocky desert foothills and canyons where the larval host Texas sacahuista grows; most often seen in a brief spring flight.
- Do not disturb
- Underside green and upper brown reveal different clues.
Good to know
‘Green hairstreak’ is not a complete identification; several Callophrys species are similar. Record the host plant, date, elevation, both wing surfaces if possible, and exact behavior. Avoid standing inside beargrass clumps where eggs and larvae may be present.
Notice these
- Green underwings
- Fine white postmedian line
- Beargrass foothill habitat