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

Entomological Consulting Services, Ltd. serves clients in local, state, and federal governmental regulatory and resource agencies; the military; and private sector clients, including law; environmental planning; architectural and civil engineering firms; agribusiness; energy, forestry, mining, utility, chemical, and petroleum companies; land developers; and non-profit organizations.

Representative clients include
  • Bechtel
  • Bureau of Land Management
  • California Department of Fish and Game
  • California Department of Forestry and Fire Protection
  • California Department of Parks and Recreation
  • Caltrans
  • Cellular One
  • Chevron
  • Cheryl Tillotson, Attorney at Law
  • CH2M Hill
  • City of Vacaville, California
  • City of Sand City, California
  • City of Scotts Valley, California
  • Creegan & D'Angelo
  • Denise Duffy & Associates, Inc.
  • EcoSystems West Consulting Group
  • EMC Planning Group, Inc.
  • ENTRIX, Inc.
  • Environmental Science Associates
  • ERM West, Inc.
  • Golden Gate Bridge District
  • Golden Gate National Park Association
  • Graniterock
  • Hanson Aggregates
  • Jones & Stokes Associates, Inc.
  • Los Angeles International Airport
  • McDonough, Holland & Allen, Attorneys at Law
  • Monterey Peninsula Regional Park District
  • North Sacramento Land Company
  • PG&E
  • Pillsbury, Madison & Sutro, Attorneys at Law
  • Sapphos Environmental, Inc.
  • San Lorenzo Valley Water District
  • The Huffman-Broadway Group, Inc.
  • The Nature Conservancy
  • Tuscarora
  • U.S. Fish and Wildlife Service
  • U.S. Forest Service
  • United Technologies Corporation
  • University of California

Photo by: R.Arnold
El Segundo Blue Butterfly

Photo by: R.Arnold
Ohlone Tiger Beetle

Photo by: R.Arnold
Palos Verdes Blue Butterfly