SURVEY
California Butterflies

Elderberry Trail, Las Trampas Regional Wilderness, Contra Costa County, CA, USA

Date 5/31/2026, 8:47:00 PM
Duration 101 minutes
Surveyors 1
Coordinates

37.8119902, -122.0440137

Protocol

California Butterflies

Targets (10 / 253)

  • Unknown Skipper (family Hesperiidae)
    2
  • Unknown Butterfly (superfamily Papilionoidea)
    5
  • Rural Skipper (Ochlodes agricola)
    10
  • Common Ringlet (Coenonympha california)
    2
  • Acmon Blue (Icaricia acmon)
    6
  • Umber Skipper (Lon melane)
    1
  • Variable Checkerspot (Euphydryas chalcedona)
    1
  • Gray Buckeye (Junonia grisea)
    42
  • Orange Sulphur (Colias eurytheme)
    6
  • Mylitta Crescent (Phyciodes mylitta)
    11

Incidentals (4)

  • Whites, Yellows, and Sulphurs (family Pieridae)
    1
  • Coppers (subfamily Lycaeninae)
    1
  • Ladies and Related Admirals (Vanessa)
    1
  • Blues (subfamily Polyommatinae)
    4