Birds Note: only species that breed in the Bioregion are included in this list
and those whose occurrence has always been restricted to the extreme perimeter
of their breeding range are not listed.
American bittern
Botaurus lentiginosus
rookeries are FSC
Great egret
Ardea alba
Snowy egret
Egretta thula
rookeries are FSC
Black-crowned night heron
Nycticorax nycticorax
Northern harrier
Circus cyaneus
Golden eagle
Aquila chrysaetos
FPS
California clapper rail
Rallus longirostris obsoletus
SE, FE (at high risk)
Virginia rail
Rallus limicola
Sora
Porzana carolina
Western snowy plover
Charadrius alexandrinus nivosus coastal pop.
FT (at high risk)
Spotted sandpiper
Actitis macularia
suitable habitat is naturally limited
Caspian tern
Sterna caspia
possibly extirpated
Common murre
Uria aalge
suitable habitat is limited (at high risk)
Marbled murrelet
Brachyramphus marmoratus
SE, FT (at high risk)
Burrowing owl
Athene cunicularia
FSC, CSC (at high risk)
Olive-sided flycatcher
Contopus cooperi
FSC
Black swift
Cypseloides niger
FSC, CSC (possibly extirpated)
Vaux's swift
Chaetura vauxi
FSC, CSC
Loggerhead shrike
Lanius ludovicianus
FSC, CSC (at high risk)
Horned lark
Eremophila alpestris
(at high risk)
Bank swallow
Riparia riparia
ST, FSC (at high risk)
Purple martin
Progne subis
CSC (at high risk)
Western bluebird
Sialia mexicana
Yellow warbler
Dendroica petechia
CSC
Yellow-breasted chat
Icteria virens
CSC (at high risk)
Lark sparrow
Chondestes grammacus
FSC
Tricolored blackbird
Agelaius tricolor
FSC, CSC (at high risk)
New Breeders in Bioregion Limited
Numbers, Future Status Uncertain
Osprey
Pandion haliaetus
re-initiation of breeding after long lapse
Peregrine falcon
Falco peregrinus
re-initiation of breeding after long lapse
Cassin's auklet
Ptychoramphus aleuticus
suitable habitat is naturally limited
Rhinoceros auklet
Cerorhinca monocerata
Red-breasted sapsucker
Sphyrapicus ruber
FSC
Varied thrush
Ixoreus naevius
Insects and Other Invertebrates
California floater mussel
Anodonta californiensis
California brackishwater snail
Tryonia imitator
Edgewood blind harvestman
Calicina (=Sitalcina) minor
FSC
Edgewood Park micro-blind harvestman
Microcina edgewoodensis
FSC
Hom's micro-blind harvestman
Microcina homi
FSC
Jung's micro-blind harvestman
Microcina jungi
FSC
California linderiella shrimp
Linderiella occidentalis
FSC
California freshwater (Tomales) isopod
Caecidotea tomalensis
Ground cricket
Neonemobius eurynotus
Zayante banded wing grasshopper
Trimerotropis infantilis
FE (local, Ben Lomond Sandhills)
Ohlone tiger beetle
Cicindela ohlone
FE
Globose dune beetle
Coelus globosus
FSC
Ricksecker's water scavenger beetle
Hydrochara rickseckeri
Leech's Skyline diving beetle
Hydroporus leechi
FSC
Mt. Hermon june beetle
Polyphylla barbata
FE (local, Ben Lomond Sandhills)
San Francisco forktail damselfly
Ischnura gemina
Opler's longhorn moth
Adela oplerella
FSC
Smith's blue butterfly
Euphilotes enoptes smithii
FE
Bay checkerspot butterfly
Euphydryas editha bayensis
FT
San Bruno elfin butterfly
Incisalia mossii bayensis
FE
Mission blue butterfly
Plebejus icarioides missionensis
FE
Unsilvered fritillary butterfly
Speyeria adiaste adiaste
Callippe silverspot butterfly
Speyeria callippe callippe
Antioch sphecid wasp
Philanthus nasalis
local, Ben Lomond Sandhills
Special Species Aggregations
Monarch butterfly aggregations
Heronries (Great blue, Black-crowned night heron,
other)
Seabird colonies (alcids)
Double-crested cormorant roosts
Bat roosts or maternity colonies
Poorly Known Species Not enough is known about the presence or absence
of these species in the Bioregion or their population size and trend to
determine if they warrant
addition to this list.