SURVEY
California Butterflies

Vollmer Peak, Tilden Regional Park, Alameda County, CA, USA

Date 6/13/2026, 5:02:00 PM
Duration 206 minutes
Surveyors 3
Coordinates

37.8846385, -122.2222317

Protocol

California Butterflies

Targets (23 / 253)

  • Unknown Papilionid (family Papilionidae)
    1
  • Unknown Skipper (family Hesperiidae)
    2
  • Unknown Lycaenid (family Lycaenidae)
    7
  • Unknown Nymphalid (family Nymphalidae)
    3
  • Unknown Butterfly (superfamily Papilionoidea)
    18
  • Common Checkered-Skipper and Allies (complex Burnsius communis)
    1
  • Field Crescent (Phyciodes pulchella)
    4
  • Rural Skipper (Ochlodes agricola)
    18
  • Checkered White (Pontia protodice)
    2
  • Common Ringlet (Coenonympha california)
    3
  • Western Tiger Swallowtail (Papilio rutulus)
    4
  • Cabbage White (Pieris rapae)
    4
  • Acmon Blue (Icaricia acmon)
    12
  • Umber Skipper (Lon melane)
    9
  • Variable Checkerspot (Euphydryas chalcedona)
    3
  • Gray Buckeye (Junonia grisea)
    50
  • Orange Sulphur (Colias eurytheme)
    11
  • Mylitta Crescent (Phyciodes mylitta)
    23
  • Gray Hairstreak (Strymon melinus)
    4
  • Anise Swallowtail (Papilio zelicaon)
    10
  • Painted Lady (Vanessa cardui)
    2
  • Mournful Duskywing (Erynnis tristis)
    12
  • Pale Swallowtail (Papilio eurymedon)
    10

Incidentals (4)

  • Whites, Yellows, and Sulphurs (family Pieridae)
    4
  • New World Checkered-Skippers (Burnsius)
    1
  • Duskywings (Erynnis)
    1
  • Ladies and Related Admirals (Vanessa)
    1