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Richard Arnold
104 Mountain View Court
Pleasant Hill, CA 94523-2188
Phone: (925) 825-3784

Endangered Species Experts

Entomological Consulting Services, Ltd. offers special expertise with rare or endangered insects, arachnids, and invertebrates, especially of California and the western United States. We have conducted in-depth field studies of both terrestrial and aquatic taxa, and have experience with all of the West Coast insects now recognized by the U.S. Fish and Wildlife Service as endangered or threatened. We can provide comprehensive study and reporting services for any project involving rare, endangered, or candidate species.

Listed species that we have worked with include [selected species will hyperlink to photos]:

Coleoptera (Beetles)
Delta Green Ground Beetle
Mount Hermon June Beetle
Ohlone Tiger Beetle
Valley Elderberry Longhorn Beetle

Elaphrus viridis
Polyphylla barbata
Cicindela ohlone
Desmocerus californicus dimorphus
Lepidoptera (Butterflies, Skippers, and Moths )
Bay Checkerspot Butterfly
Behren's Silverspot Butterfly
Callippe Silverspot Butterfly
Carson Wandering Skipper
El Segundo Blue Butterfly
Karner Blue Butterfly
Kern Primrose Sphinx Moth
Laguna Mountains Skipper
Lange's Metalmark Butterfly
Lotis Blue Butterfly
Mission Blue Butterfly
Mitchell's Satyr Butterfly
Myrtle's Silverspot Butterfly
Oregon Silverspot Butterfly
Palos Verdes Blue Butterfly
Quino Checkerspot Butterfly
San Bruno Elfin Butterfly
Schaus Swallowtail Butterfly
Smith's Blue Butterfly

Euphydryas editha bayensis
Speyeria zerene behrensii
Speyeria callippe callippe
Pseudocopaeodes eunus obscurus
Euphilotes bernardino (=battoides) allyni
Lycaeides melissa samuelis
Euproserpinus euterpe
Pyrgus ruralis lagunae
Apodemia mormo langei
Lycaeides idas (=argyrognomon) lotis
Icaricia icarioides missionensis
Neonympha mitchelli mitchelli
Speyeria zerene myrtleae
Speyeria zerene hippolyta
Glaucopsyche lygdamus palosverdesensis
Euphydryas editha quino
Incisalia mossii bayensis
Heraclides (=Papilio) aristodemus ponceanus
Euphilotes enoptes smithi
Other Insect Orders
Delhi Sands Flower-loving Fly
Hine's Emerald Dragonfly
Zayante Band-winged Grasshopper

Rhaphiomidas terminatus abdominalis Somatochlora hineana
Trimerotropis infantilis

California Freshwater Shrimp
Conservancy Fairy Shrimp
Longhorn Fairy Shrimp
Riverside Fairy Shrimp
Shasta Crayfish
Vernal Pool Fairy Shrimp
Vernal Pool Tadpole Shrimp

Syncaris pacifica
Branchinecta conservatio
Branchinecta longiantenna
Streptocephalus woottoni
Pacifastacus fortis
Branchinecta lynchi
Lepidurus packardi
SNAILS (top)
Morro Shoulderband Snail
Trinity Bristle Snail

Helminthoglypta walkeriana
Monadenia setosa

Photo by: R.Arnold
Palos Verdes Blue Butterfly

Photo by: R.Arnold
Valley Elderberry Longhorn Beetle

Photo by: R.Arnold
San Bruno Elfin Butterfly

Photo by: R.Arnold
Mitchell's Satyr Butterfly