Biological Services - Species List

At Tremaine, we specialize in comprehensive preconstruction surveys and assessments for state and federally listed species in compliance with CEQA, NEPA, and regulatory agency permit conditions. Our experienced biologists conduct habitat evaluations, species-specific protocol surveys, and clearance monitoring to ensure full regulatory compliance before ground-disturbing activities begin. We work closely with Caltrans, CDFW, USFWS, and project proponents to minimize environmental impact and prevent costly construction delays.

Amphibians & Reptiles

California Red-Legged Frog (Rana draytonii) – Threatened (Federal)
Foothill Yellow-Legged Frog (Rana boylii) – Threatened (State)
Sierra Nevada Yellow-Legged Frog (Rana sierrae) – Endangered (Federal and State)
California Tiger Salamander (Ambystoma californiense) – Threatened (Federal and State)
Western Pond Turtle (Actinemys marmorata) – Special Concern (State)
Desert Tortoise (Gopherus agassizii) – Threatened (Federal and State)
Western Spadefoot
Blunt-nosed Leopard Lizard

Birds

Swainson’s Hawk (Buteo swainsoni) – Threatened (State)
Burrowing Owl (Athene cunicularia) – Special Concern (State)
Western Snowy Plover (Charadrius nivosus nivosus) – Threatened (Federal)
Tricolored Blackbird (Agelaius tricolor) – Threatened (State)
California Gnatcatcher (Polioptila californica californica) – Threatened (Federal)
Least Bell’s Vireo (Vireo bellii pusillus) – Endangered (Federal)

Mammals

San Joaquin Kit Fox (Vulpes macrotis mutica) – Endangered (Federal), Threatened (State)
American Badger (Taxidea taxus) – Special Concern (State)
Pallid Bat (Antrozous pallidus) – Special Concern (State)
Townsend’s Big-eared Bat (Corynorhinus townsendii) – Special Concern (State)
Western Red Bat (Lasiurus blossevillii) – Special Concern (State)

Invertebrates

Vernal Pool Fairy Shrimp (Branchinecta lynchi) – Threatened (Federal)
Conservancy Fairy Shrimp (Branchinecta conservatio) – Endangered (Federal)
Valley Elderberry Longhorn Beetle (Desmocerus californicus dimorphus) – Threatened (Federal)
Crotch's Bumble Bee