| Numbers of Butterflies Seen at Summer Counts, Jerry Powell, compiler. | |||||||||
| Date of Observations | |||||||||
| Latin Name | Common Name | 6/29/98 | 6/5/99 | 6/10/00 | 6/10/01 | 6/20/02 | 6/21/03 | 6/11/04 | 6/28/05 |
| Papilionidae | |||||||||
| Swallowtails | |||||||||
| Papilio zelicaon | Anise Swallowtail | 1 | 3 | 1 | 3 | ||||
| Papilio rutulus | Western Tiger Swallowtail | 16 | 3 | 24 | 13 | 3 | 16 | 24 | 17 |
| Papilio eurymedon | Pale Swallowtail | 20 | 28 | 14 | 37 | 38 | 15 | 56 | 20 |
| Pieridae | |||||||||
| Whites and Sulphurs | |||||||||
| Pieris rapae | Cabbage White | 1 | 4 | 8 | 15 | 4 | 2 | ||
| Anthocaris sara | Sara Orangetip | 18 | 14 | 3 | 1 | ||||
| Colias eurytheme | Orange Sulphur | 5 | 1 | 3 | 9 | 20 | 36 | ||
| Colias eurydice | California Dogface | 1 | 24 | 1 | 2 | 17 | 7 | ||
| Pieris napi | Green-veined White | 2 | |||||||
| Pontia protodice | Checkered White | 4 | 1 | 3 | |||||
| Lycaenidae | |||||||||
| Gossamer-wings | |||||||||
| Lycaena arota | Tailed Copper | 3 | 1 | 2 | 2 | 2 | |||
| Lycaena xanthoides | Great Copper | 2 | 2 | 4 | 8 | 18 | 9 | 8 | 7 |
| Lycaena gorgon | Gorgon Copper | 3 | 8 | 7 | 14 | 10 | 10 | 9 | 10 |
| Lycaena helloides | Purplish Copper | 3 | 1 | ||||||
| Habrodais grunus | Golden Hairstreak | 38 | 2 | 22 | |||||
| Atlides halesus | Great Purple Hairstreak | 1 | |||||||
| Satyrium californica | California Hairstreak | 3 | 14 | 5 | 15 | 5 | 13 | 6 | |
| Satyrium sylvinus (dryope) | Sylvan Hairstreak | 1 | 10 | 4 | 4 | 12 | 17 | ||
| Sylvinus saepium | Hedgerow Hairstreak | 5 | 10 | 4 | 24 | 2 | |||
| Callophrys augustinus | Brown Elfin | 5 | 4 | 28 | 6 | 7 | 11 | 17 | |
| Strymon melinus | Gray Hairstreak | 8 | 1 | 3 | 1 | 7 | |||
| Everes amyntula | Western Tailed-Blue | 1 | 1 | 4 | 1 | ||||
| Celastrina ladon (echo) | Spring Azure | 18 | 4 | 62 | 72 | 124 | 83 | 199 | 102 |
| Euphilotes enoptes | Dotted Blue | 1 | |||||||
| Callophrys dumetorum | Coastal Green Hairstreak | 2 | 1 | ||||||
| Satyrium auretorum | Gold-hunter's Hairstreak | 1 | 1 | ||||||
| Satyrium tetra | Mountain Mahogany Hairstreak | 1 | 1 | 1 | |||||
| Glaucopsyche lygdamus | Silvery Blue | 3 | 57 | 2 | 4 | 5 | 3 | ||
| Plebejus icarioides | Boisduval's Blue | 12 | 8 | 2 | 15 | 1 | 6 | 1 | 8 |
| Plebejus acmon | Acmon Blue | 28 | 15 | 48 | 59 | 101 | 167 | 21 | 194 |
| Nymphalidae | |||||||||
| Brush-foots | |||||||||
| Speyeria coronis | Coronis Fritillary | 26 | 5 | 6 | 39 | 64 | 11 | 19 | 9 |
| Speyeria callippe | Callippe Fritillary | 6 | 68 | 53 | 65 | 18 | 66 | 59 | |
| Speyeria adiaste | Unsilvered Fritillary | 5 | 1 | 7 | 54 | 31 | 28 | 56 | 17 |
| Chlosyne palla | Northern Checkerspot | 6 | 43 | 16 | 21 | 20 | 15 | 3 | 1 |
| Phyciodes mylitta | Mylitta Crescent | 4 | 2 | 7 | 32 | 9 | 9 | 11 | 17 |
| Euphydryas chalcedona | Variable Checkerspot | 26 | 47 | 46 | 35 | 22 | 0 | 8 | 3 |
| Polygonia satyrus | Satyr Comma | 4 | 1 | ||||||
| Nymphalis californica | California Tortoiseshell | 1 | 4 | 12 | 5 | 1 | |||
| Nymphalis antiopa | Mourning Cloak | 1 | |||||||
| Vanessa virginiensis | American Lady | 3 | 5 | 2 | 2 | 3 | |||
| Vanessa cardui | Painted Lady | 4 | 1 | 12 | 2 | 6 | |||
| Vanessa annabella | West Coast Lady | 1 | |||||||
| Vanessa atalanta | Red Admiral | 1 | 1 | 1 | |||||
| Junonia coenia | Common Buckeye | 95 | 7 | 6 | 33 | 54 | 181 | 5 | 113 |
| Limenitis lorquini | Lorquin's Admiral | 8 | 23 | 14 | 19 | 36 | 25 | 23 | 7 |
| Adelpha bredowii | California Sister | 16 | 10 | 47 | 67 | 61 | 42 | 102 | 53 |
| Polygonia oreas | Orea's Comma | 1 | |||||||
| Satyridae | |||||||||
| Satyrs | |||||||||
| Coenonympha tullia | Common Ringlet | 27 | 75 | 18 | 19 | 12 | 40 | 30 | 22 |
| Danaidae | |||||||||
| Monarchs | |||||||||
| Danaus plexippus | Monarch | 8 | 1 | 3 | 1 | 4 | 6 | ||
| Hesperiidae | |||||||||
| Skippers | |||||||||
| Thorybes pylades | Northern Cloudywing | 8 | 9 | 18 | 21 | 7 | 3 | 1 | 1 |
| Erynnis brizo | Sleepy Duskywing | 1 | |||||||
| Erynnis propertius | Propertius Duskywing | 16 | 10 | 14 | 19 | 22 | 7 | 9 | 7 |
| Erynnis tristo | Mournful Duskywing | 1 | 23 | 16 | 4 | 3 | 4 | 7 | |
| Erynnis pacuvius (callidus) | Pacuvius Duskywing | 3 | 3 | 9 | 2 | 5 | |||
| Pyrgus communis | Common Chekered-Skipper | 1 | |||||||
| Heliopetes ericetorum | Northern White-Skipper | 1 | |||||||
| Hesperia columbia | Columbian Skipper | 2 | |||||||
| Ochoides agricola | Rural Skipper | 7 | 5 | 36 | 44 | 46 | 56 | 35 | 48 |
| Poanes melane | Umber Skipper | 1 | |||||||
| Pyrgus ruralis | Two-banded Checkered-Skipper | 2 | 1 | 1 | 1 | ||||
| Epargyreus clarus | Silver-Spotted Skipper | 5 | 3 | 1 | 8 | 1 | |||
| No. Individuals Counted | 407 | 396 | 519 | 855 | 835 | 830 | 810 | 865 | |
| No. Known Speices | 34 | 30 | 30 | 43 | 39 | 45 | 41 | 41 | |
| Party Hours | 8.5 | 8 | 12.75 | 10.5 | 17 | 15.83 | 10.25 | 13 | |