SURVEY
California Butterflies

Sycamore Creek area, Mount Diablo State Park, Contra Costa County, CA, USA

Date 5/27/2026, 5:32:00 PM
Duration 281 minutes
Surveyors 1
Coordinates

37.848496, -121.9315821

Protocol

California Butterflies

Targets (16 / 253)

  • Unknown Nymphalid (family Nymphalidae)
    2
  • Unknown Butterfly (superfamily Papilionoidea)
    3
  • Northern Checkerspot (Chlosyne palla)
    9
  • Rural Skipper (Ochlodes agricola)
    69
  • California Tortoiseshell (Nymphalis californica)
    41
  • Common Ringlet (Coenonympha california)
    8
  • Acmon Blue (Icaricia acmon)
    2
  • Umber Skipper (Lon melane)
    12
  • Variable Checkerspot (Euphydryas chalcedona)
    6
  • Gray Buckeye (Junonia grisea)
    17
  • Orange Sulphur (Colias eurytheme)
    5
  • Echo Azure (Celastrina echo)
    10
  • Mylitta Crescent (Phyciodes mylitta)
    5
  • California Sister (Adelpha californica)
    1
  • Sleepy Duskywing (Erynnis brizo)
    null
  • Mournful Duskywing (Erynnis tristis)
    2

Incidentals (2)

  • Duskywings (Erynnis)
    2
  • Ladies and Related Admirals (Vanessa)
    1