Endangered Species Search by Area Selection

Find out if there are any endangered species in your state, your country, island, etc. Browse endangered species listings according to area on our planet using the selection box below.

For a complete list of US endangered species, select United States below. Browse the different areas in the pulldown for other countries or specific US or Canadian states. For sea creatures and creatures found on islands in the oceans, we recommend browsing the oceania list.

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Note/Disclaimer: This list is made possible through a database keyword search/filtering process which may not be 100% accurate. Therefore, all endangered species of California may not be listed here. For a complete list of endangered species in North America, browse the North America endangered species list or see the complete United States List.

Endangered species found in California:

This list combines species from several endangered species lists. Using the total at the bottom of this page as an official count of endangered species of the world is not recommended. For more information on what creatures are listed on this site, please visit our About Us page.

	Species Name	Scientific Name	Group	Range
1.	Allyn Smith's Banded Snail	Helminthoglypta allynsmithi	Snails	California
2.	Amargosa Niterwort	Nitrophila mohavensis	Plants	California, Nevada
3.	Amargosa Vole	Microtus californicus scirpensis	Mammals	California
4.	Antioch Dunes Evening-primrose	Oenothera deltoides ssp. howellii	Plants	California
5.	Arroyo Southwestern Toad	Bufo californicus microscaphus	Amphibians	California, Mexico
6.	Ashy Storm-petrel	Oceanodroma homochroa	Birds	California, Ecuador, Mexico
7.	Avalon Hairstreak	Strymon avalona	Insects	California
8.	Baker's Cypress	Cupressus bakeri	Plants	California, Oregon
9.	Baker's Larkspur	Delphinium bakeri	Plants	California
10.	Beach Layia	Layia carnosa	Plants	California
11.	Bedstraw	Galium buxifolium	Plants	California
12.	Bedstraw	Galium californicum ssp. sierrae	Plants	California
13.	Belkin's Dune Tabanid Fly	Brennania belkini	Insects	California, Mexico
14.	Bell's Vireo	Vireo bellii	Birds	California, El Salvador, Guatemala, Honduras, Mexico, Nicaragua
15.	Ben Lomond Spineflower	Chorizanthe pungens var. hartwegiana	Plants	California
16.	Ben Lomond Wallflower	Erysimum teretifolium	Plants	California
17.	Bendire's Thrasher	Toxostoma bendirei	Birds	Arizona, California, Canada, Mexico, Nevada, New Mexico, Utah
18.	Berberis pinnata ssp. insularis	Berberis pinnata ssp. insularis	Plants	California
19.	Berberis nevinii	Berberis nevinii	Plants	California
20.	Bicolor Cactus Snail	Xerarionta tryoni	Snails	California
21.	Bighorn Sheep	Ovis canadensis	Mammals	California
22.	Black Abalone	Haliotis cracherodii	Snails	California, Mexico (Baja California)
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23.	Black Rail	Laterallus jamaicensis	Birds	Central America, North America (including United States), South America
24.	Black Sea Bass	Stereolepis gigas	Fishes	California, Mexico
25.	Black Toad	Anaxyrus exsul	Amphibians	California
26.	Black-vented Shearwater	Puffinus opisthomelas	Birds	Mexico, United States (California)
27.	Blunt-nosed Leopard Lizard	Gambelia silus	Reptiles	California
28.	Bocaccio Rockfish	Sebastes paucispinus	Fishes	Canada, Mexico, United States
29.	Boisduval's Blue Butterfly	Aricia icarioides	Insects	California, Oregon
30.	Bonytail Chub	Gila elegans	Fishes	Arizona, California, Colorado, Nevada, Utah, Wyoming
31.	Braunton's Milk-vetch	Astragalus brauntonii	Plants	California
32.	Bronze Whaler	Carcharhinus brachyurus	Fishes	Africa, Asia, Australia, Europe, Middle East, North America (including United States), South America
33.	Brown Pelican	Pelecanus occidentalis	Birds	Coastal Central and South America, USA (Carolinas to Texas, California, Oregon, Washington), West Indies
34.	Buena Vista Lake Ornate Shrew	Sorex ornatus relictus	Mammals	California
35.	Buff-breasted Sandpiper	Tryngites subruficollis	Birds	Africa, Australia, Central America, Europe, Middle East, North America (including United States Territory), Oceanic, South America
36.	Bullseye Electric Ray	Diplobatus ommata	Fishes	California, Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama
37.	Burke's Goldfields	Lasthenia burkei	Plants	California
38.	California Bay Pea Crab	Parapinnixa affinis	Crustaceans	California
39.	California Condor	Gymnogyps californianus	Birds	California
40.	California Freshwater Shrimp	Syncaris pacifica	Crustaceans	California
41.	California Giant Salamander	Dicamptodon ensatus	Amphibians	California
42.	California Jewelflower	Caulanthus californicus	Plants	California
43.	California Orcutt Grass	Orcuttia californica	Plants	California
44.	California Red Tree Mouse	Arborimus pomo	Mammals	California
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45.	California Red-legged Frog	Rana draytonii	Amphibians	California, Mexico
46.	California Seablite	Suaeda californica	Plants	California
47.	California Sheephead	Semicossyphus pulcher	Fishes	Mexico, United States (California)
48.	California Taraxacum	Taraxacum californicum	Plants	California
49.	California Tiger Salamander	Ambystoma californiense	Amphibians	California
50.	Calistoga Allocarya	Plagiobothrys strictus	Plants	California
51.	Callippe Silverspot Butterfly	Speyeria callippe callippe	Insects	California
52.	Campbell's Liverwort	Geothallus tuberosus	Plants	California
53.	Carex albida	Carex albida	Plants	California
54.	Carson Wandering Skipper	Pseudocopaeodes eunus obscurus	Insects	California, Nevada
55.	Cascades Frog	Rana cascadae	Amphibians	California, Canada
56.	Cassin's Finch	Haemorhous cassinii	Birds	Canada, Mexico, United States
57.	Catalina Island Mountain-Mahogany	Cercocarpus traskiae	Plants	California
58.	Catalina Mountain Snail	Radiocentrum avalonense	Snails	California
59.	Chestnut-collared Longspur	Calcarius ornatus	Birds	North America (including United States)
60.	Chinook Salmon	Oncorhynchus tshawytscha	Fishes	California (Sacramento River) in the winters
61.	Ciervo Scarab Beetle	Aegialia concinna	Insects	California
62.	Clapper Rail	Rallus longirostris	Birds	Arizona, California
63.	Clara Hunt's Milk-vetch	Astragalus clarianus	Plants	California
64.	Clouded Salamander	Aneides ferreus	Amphibians	California, Oregon
65.	Clover Lupine	Lupinus tidestromii	Plants	California
66.	Coachelia Giant Sand Treader Cricket	Macrobaenetes valgum	Insects	California
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67.	Coachella Valley Fringe-toed Lizard	Uma inornata	Reptiles	California
68.	Coachella Valley Jerusalem Cricket	Stenopelmatus cahuilaensis	Insects	California
69.	Coachella Valley Milk-vetch	Astragalus lentiginosus var. coachellae	Plants	California
70.	Coast Redwood	Sequoia sempervirens	Plants	California, Oregon
71.	Coastal Dunes Milk-vetch	Astragalus tener var. titi	Plants	California
72.	Coho Salmon	Oncorhynchus kisutch	Fishes	California
73.	Colorado Desert Fringe-toed Lizard	Uma notata	Reptiles	California, Mexico
74.	Colorado Pikeminnow	Ptychocheilus lucius	Fishes	Arizona, California, Colorado, Mexico, Nevada, New Mexico, Utah, Wyoming
75.	Common Sawfish	Pristis pristis	Fishes	Africa, Asia, Australia, Central and South America, Europe, Mexico, United States
76.	Concentrated Snail	Micrarionta facta	Snails	California
77.	Conservancy Fairy Shrimp	Branchinecta conservatio	Crustaceans	California
78.	Contra Costa Goldfields	Lasthenia conjugens	Plants	California
79.	Contra Costa Wallflower	Erysimum capitatum var. angustatum	Plants	California
80.	Cougar	Puma concolor	Mammals	North and Central America
81.	Coyote Ceanothus	Ceanothus ferrisae	Plants	California
82.	Craveri's Murrelet	Synthliboramphus craveri	Birds	California, Mexico
83.	Cushenbury Milk-vetch	Astragalus albens	Plants	California
84.	Cushenbury Oxytheca	Oxytheca parishii var. goodmaniana	Plants	California
85.	Cushion Buckwheat	Eriogonum ovalifolium	Plants	California, Nevada
86.	Del Mar Manzanita	Arctostaphylos glandulosa ssp. crassifolia	Plants	California, Mexico
87.	Del Norte Salamander	Plethodon elongatus	Amphibians	California
88.	Delhi Sands Flower-loving Fly	Rhaphiomidas terminatus abdominalis	Insects	California
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89.	Delta Green Ground Beetle	Elaphrus viridis	Insects	California
90.	Delta Smelt	Hypomesus transpacificus	Fishes	California
91.	Desert Pupfish	Cyprinodon macularius	Fishes	Arizona, California, Mexico
92.	Desert Slender Salamander	Batrachoseps aridus	Amphibians	California
93.	Desert Tortoise	Gopherus agassizii	Reptiles	Arizona, California, Mexico, Nevada, Utah
94.	Devil Fish	Manta birostris	Fishes	Africa, Asia, Australia, Central America, Europe, Hawaii, Middle East, North America, Oceanic, South America
95.	Dolloff Cave Spider	Meta dolloff	Arachnids	California, Texas
96.	El Segundo Blue Butterfly	Euphilotes battoides allyni	Insects	California
97.	Emerald Valvata	Valvata virens	Snails	California
98.	Empire Cave Pseudoscorpion	Fissilicreagris imperialis	Arachnids	California
99.	Eureka Dune Grass	Swallenia alexandrae	Plants	California
100.	Eureka Valley Evening-primrose	Oenothera avita ssp. eurekensis	Plants	California
101.	Few-flowered Navarretia	Navarretia leucocephala ssp. pauciflora	Plants	California
102.	Flat-tailed Horned Lizard	Phrynosoma mcallii	Reptiles	Arizona, California, Mexico
103.	Foothill Yellow-legged Frog	Rana boylii	Amphibians	California, Mexico, Oregon
104.	Fountain Thistle	Cirsium fontinale	Plants	California
105.	Franklin's Bumble Bee	Bombus franklini	Insects	California, Oregon
106.	Fraternal Snail	Micrarionta feralis	Snails	California
107.	Frilled Shark	Chlamydoselachus anguineus	Fishes	Angola, Australia, Chile, France, Guyana, Japan, Mauritania, Morocco, Namibia, New Zealand, Norway, Portugal (Madeira), South Africa, Spain, United Kingdom, United States (California)
108.	Gabb's Snail	Micrarionta gabbii	Snails	California
109.	Galapagos Shark	Carcharhinus galapagensis	Fishes	Africa, Asia, Australia, Central America, Europe, North America (Hawaii/US Territory), Oceanic, South America
110.	Gambel's Watercress	Rorippa gambellii	Plants	California
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111.	Gaviota Tarplant	Deinandra increscens ssp. villosa	Plants	California
112.	Giant Garter Snake	Thamnophis gigas	Reptiles	California
113.	Giant Kangaroo Rat	Dipodomys ingens	Mammals	California
114.	Giant Sequoia	Sequoiadendron giganteum	Plants	United States (California)
115.	Gila Monster	Heloderma suspectum	Reptiles	Mexico, United States
116.	Gilia	Gilia tenuiflora	Plants	California
117.	Globose Dune Beetle	Coelus globosus	Insects	California, Mexico
118.	Gowen Cypress	Cupressus goveniana	Plants	California
119.	Grady's Cave Amphipod	Stygobromus gradyi	Crustaceans	California
120.	Gray Wolf	Canis lupus	Mammals	Mexico, United States
121.	Great Basin Bristlecone Pine	Pinus longaeva	Plants	California, Nevada, Utah
122.	Greater Sage-grouse	Centrocercus urophasianus	Birds	Canada, United States
123.	Green Sturgeon	Acipenser medirostris	Fishes	Alaska, California, Canada (British Columbia), Mexico, Oregon
124.	Greene's Tuctoria	Tuctoria greenei	Plants	California
125.	Guadalupe Fur Seal	Arctocephalus townsendi	Mammals	California, Mexico
126.	Guadalupe Island Cypress	Cupressus guadalupensis	Plants	California, Mexico
127.	Gulf Grouper	Mycteroperca jordani	Fishes	California, Mexico
128.	Hairy Orcutt Grass	Orcuttia pilosa	Plants	California
129.	Hammerhead Shark	Sphyrna mokarran	Fishes	Africa, Asia, Australia, Central and South America, Middle East, Oceanic, United States
130.	Hara's Cave Amphipod	Stygobromus harai	Crustaceans	California
131.	Hartweg's Golden Sunburst	Pseudobahia bahiifolia	Plants	California
132.	Heermann's Gull	Larus heermanni	Birds	Arizona, California, Canada, Guatemala, Mexico, Oregon, Washington
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133.	Hermes Copper	Lycaena hermes	Insects	California, Mexico
134.	Hesperodiaptomus californiensis	Hesperodiaptomus californiensis	Crustaceans	California
135.	Hickman's Potentilla	Potentilla hickmanii	Plants	California
136.	Hoffmann's Rock-cress	Arabis hoffmannii	Plants	California
137.	Howell's Spineflower	Chorizanthe howellii	Plants	California
138.	Indian Knob Mountain Balm	Eriodictyon altissimum	Plants	California
139.	Inyo Mountains Salamander	Batrachoseps campi	Amphibians	California
140.	Ione Buckwheat	Eriogonum apricum	Plants	California
141.	Ischnura gemina	Ischnura gemina	Insects	California
142.	Island Fox	Urocyon littoralis	Mammals	California
143.	Island Malacothrix	Malacothrix squalida	Plants	California
144.	Island Phacelia	Phacelia insularis ssp. insularis	Plants	California
145.	Island Scrub-jay	Aphelocoma insularis	Birds	California
146.	Jaguar	Panthera onca	Mammals	Arizona, California, Central and South America, Louisiana, Mexico, New Mexico, Texas
147.	Japanese Devilray	Mobula japanica	Fishes	Africa, Asia, Australia, Central America, Hawaii, Middle East, North America, Oceanic, South America
148.	Kangaroo Rat	Dipodomys nitratoides	Mammals	California
149.	Keck's Checker-mallow	Sidalcea keckii	Plants	California
150.	Keeled Sideband	Monadenia circumcarinata	Snails	California
151.	Kelso Giant Sand Treader Cricket	Macrobaenetes kelsoensis	Insects	California
152.	Kelso Jerusalem Cricket	Ammopelmatus kelsoensis	Insects	California
153.	Kern Canyon Slender Salamander	Batrachoseps simatus	Amphibians	California
154.	Kern Mallow	Eremalche kernensis	Plants	California
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155.	Kern Plateau Salamander	Batrachoseps robustus	Amphibians	California
156.	Kern Shoulderband	Helminthoglypta callistoderma	Snails	California
157.	Kings River Slender Salamander	Batrachoseps regius	Amphibians	California
158.	Kneeland Prairie Penny-cress	Thlaspi californicum	Plants	California
159.	La Graciosa Thistle	Cirsium loncholepis	Plants	California
160.	Laguna Mountains Skipper	Pyrgus ruralis lagunae	Insects	California
161.	Lake County Stonecrop	Parvisedum leiocarpum	Plants	California
162.	Lane Mountain Milk-vetch	Astragalus jaegerianus	Plants	California
163.	Lange's Metalmark Butterfly	Apodemia mormo langei	Insects	California
164.	Large-flowered Fiddleneck	Amsinckia grandiflora	Plants	California
165.	Laysan Albatross	Phoebastria immutabilis	Birds	Alaska, Australia (Norfolk Island), California, Canada, Federated States of Micronesia, Hawaii, Japan, Marshall Islands, Mexico, New Zealand, Northern Mariana Islands, Oregon, Washington
166.	Least Tern	Sterna antillarum	Birds	Bahamas, Central America (winters), Greater and Lesser Antilles, Mexico, Northern South America, USA (California, including the Miss. R. Basin), Atlantic Gulf Coasts
167.	Limestone Salamander	Hydromantes brunus	Amphibians	California
168.	Loch Lomond Coyote Thistle	Eryngium constancei	Plants	California
169.	Lompoc Grasshopper	Trimerotropis occulens	Insects	California
170.	Lompoc Yerba Santa	Eriodictyon capitatum	Plants	California
171.	Longfin Mako	Isurus paucus	Fishes	Africa, Asia, Australia, Central America, Europe, North America (including United States and Hawaii), Oceanic, South America
172.	Longhorn Fairy Shrimp	Branchinecta longiantenna	Crustaceans	California
173.	Lost River Sucker	Deltistes luxatus	Fishes	California, Oregon
174.	Lotis Blue Butterfly	Lycaeides argyrognomon lotis	Insects	California
175.	Lyon's Pentachaeta	Pentachaeta lyonii	Plants	California
176.	Mackenzie's Cave Amphipod	Stygobromus mackenziei	Crustaceans	California
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177.	Manica parasitica	Manica parasitica	Insects	California
178.	Many-flowered Navarretia	Navarretia leucocephala ssp. plieantha	Plants	California
179.	Marbled Murrelet	Brachyramphus marmoratus	Birds	Canada, Mexico, United States
180.	McDonald's Rock-cress	Arabis mcdonaldiana	Plants	California
181.	Melones Cave Harvestman	Banksula melones	Arachnids	California
182.	Menzies' Wallflower	Erysimum menziesii	Plants	California
183.	Merriam's Kangaroo Rat	Dipodomys merriami	Mammals	Mexico, United States
184.	Mesa Shoulderband	Helminthoglypta coelata	Snails	California
185.	Metcalf Canyon Jewelflower	Streptanthus albidus ssp. albidus	Plants	California
186.	Mexican Flannelbush	Fremontodendron mexicanum	Plants	California, Mexico
187.	Mexican Long-tongued Bat	Choeronycteris mexicana	Mammals	Arizona, California, El Salvador, Guatemala, Honduras, Mexico, Nevada, New Mexico, Texas
188.	Middlekauf's Shieldback Katydid	Idiostatus middlekaufi	Insects	California
189.	Modoc Sucker	Catostomus microps	Fishes	California
190.	Mohave Ground Squirrel	Xerospermophilus mohavensis	Mammals	United States (California)
191.	Mohave Tui Chub	Gila bicolor mohavensis	Fishes	California
192.	Monterey Clover	Trifolium trichocalyx	Plants	California
193.	Monterey Cypress	Cupressus macrocarpa	Plants	California
194.	Morro Bay Kangaroo Rat	Dipodomys heermanni morroensis	Mammals	California
195.	Morro Shoulderband Snail	Helminthoglypta walkeriana	Snails	California
196.	Mountain Yellow-legged Frog	Rana muscosa	Amphibians	USA - Southern California DPS
197.	Mt. Hermon June Beetle	Polyphylla barbata	Insects	California
198.	Munz's Onion	Allium munzii	Plants	California
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199.	Napa Bluegrass	Poa napensis	Plants	California
200.	Nelson's Antelope Squirrel	Ammospermophilus nelsoni	Mammals	California
201.	Nipomo Mesa Lupine	Lupinus nipomensis	Plants	California
202.	North Pacific Right Whale	Balaena japonica	Mammals	Canada (British Columbia), China, Japan, Korea, Mexico (Baja California), Russia, Taiwan, United States and Hawaii
203.	Northern Abalone	Haliotis kamtschatkana	Snails	Alaska, California, Canada (British Columbia), Oregon, Washington
204.	Northern California Black Walnut	Juglans californica	Plants	California
205.	Northern Fur Seal	Callorhinus ursinus	Mammals	Arkansas, California, Canada, China, Japan, Korea, Mexico, Oregon, Russia, Taiwan, Washington
206.	Northern Guitarfish	Rhinobatos productus	Fishes	California, Mexico
207.	Oceanic Whitetip Shark	Carcharhinus longimanus	Fishes	Africa, American Samoa, Asia, Australia, Central America, Europe, Middle East, North America (including United States and Hawaii), Oceanic, South America
208.	Ohlone Tiger Beetle	Cicindela ohlone	Insects	California
209.	Olive-sided Flycatcher	Contopus cooperi	Birds	Central and South America, North America (including United States)
210.	Orcutt's Spineflower	Chorizanthe orcuttiana	Plants	California
211.	Oregon Checker-mallow	Sidalcea oregana	Plants	California
212.	Otay Mesa-mint	Pogogyne nudiuscula	Plants	California, Mexico (Baja California)
213.	Owens Pupfish	Cyprinodon radiosus	Fishes	California
214.	Owens Tui Chub	Gila bicolor snyderi	Fishes	California
215.	Pacific Pocket Mouse	Perognathus longimembris pacificus	Mammals	California
216.	Pacific Pond Turtle	Actinemys marmorata	Reptiles	California, Mexico, Oregon, Washington
217.	Pacific Seahorse	Hippocampus ingens	Fishes	Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Mexico, Panama, Peru, United States (California)
218.	Palmate-bracted Bird's-beak	Cordylanthus palmatus	Plants	California
219.	Palos Verdes Blue Butterfly	Glaucopsyche lygdamus palosverdesensis	Insects	California
220.	Panamint Alligator Lizard	Elgaria panamintina	Reptiles	California
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221.	Pedate Checker-mallow	Sidalcea pedata	Plants	California
222.	Pennell's Bird's-beak	Cordylanthus tenuis ssp. capillaris	Plants	California
223.	Pine Hill Ceanothus	Ceanothus roderickii	Plants	California
224.	Pine Hill Flannelbush	Fremontodendron californicum ssp. decumbens	Plants	California
225.	Pinyon Jay	Gymnorhinus cyanocephalus	Birds	United States
226.	Pismo Clarkia	Clarkia speciosa ssp. immaculata	Plants	California
227.	Pitkin Marsh Lily	Lilium pardalinum ssp. pitkinense	Plants	California
228.	Plain Cactus Snail	Xerarionta intercisa	Snails	California
229.	Point Arena Mountain Beaver	Aplodontia rufa nigra	Mammals	California
230.	Port Conception Jerusalem Cricket	Ammopelmatus muwu	Insects	California
231.	Port Orford Cedar	Chamaecyparis lawsoniana	Plants	California, Oregon
232.	Presidio Clarkia	Clarkia franciscana	Plants	California
233.	Presidio Manzanita	Arctostaphylos hookeri var. ravenii	Plants	California
234.	Prickly Pear	Opuntia treleasei	Plants	California
235.	Prickly Pear Island Snail	Micrarionta opuntia	Snails	California
236.	Prickly Shark	Echinorhinus cookei	Fishes	Australia, California, China, Hawaii, New Zealand, Palau, Peru, Taiwan
237.	Quercus tomentella	Quercus tomentella	Plants	California, Mexico
238.	Quercus macdonaldii	Quercus macdonaldii	Plants	California
239.	Quercus engelmannii	Quercus engelmannii	Plants	California, Mexico
240.	Quercus dumosa	Quercus dumosa	Plants	California, Mexico
241.	Quino Checkerspot Butterfly	Euphydryas editha quino	Insects	California, Mexico
242.	Razorback Sucker	Xyrauchen texanus	Fishes	Arizona, California, Colorado, Mexico, Nevada, New Mexico, Utah, Wyoming
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243.	Red Tree Vole	Arborimus longicaudus	Mammals	California, Oregon
244.	Red-crowned Parrot	Amazona viridigenalis	Birds	Mexico, Puerto Rico, US (TX, FL, CA)
245.	Riparian Brush Rabbit	Sylvilagus bachmani riparius	Mammals	California
246.	Riparian Woodrat	Neotoma fuscipes riparia	Mammals	California
247.	Robust Spineflower	Chorizanthe robusta	Plants	California
248.	Rough Sculpin	Cottus asperrimus	Fishes	California
249.	Sacramento Anthicid Beetle	Anthicus sacramento	Insects	United States
250.	Sacramento Orcutt Grass	Orcuttia viscida	Plants	California
251.	Sacramento Splittail	Pogonichthys macrolepidotus	Fishes	California
252.	Salt Marsh Bird's-beak	Cordylanthus maritimus ssp. maritimus	Plants	California, Mexico (Baja California)
253.	Salt Marsh Harvest Mouse	Reithrodontomys raviventris	Mammals	California
254.	Sambar Deer	Rusa unicolor	Mammals	Africa, Asia, Australia, Central America, North America (United States)
255.	Samwell Cave Cricket	Pristoceuthophilus sp. nov.	Insects	United States (California)
256.	San Bernardino Bluegrass	Poa atropurpurea	Plants	California
257.	San Bernardino Mountains Bladderpod	Lesquerella kingii ssp. bernardina	Plants	California
258.	San Bruno Elfin Butterfly	Callophrys mossii bayensis	Insects	California
259.	San Clemente Island Broom	Lotus dendroideus ssp. traskiae	Plants	California
260.	San Clemente Island Bush-mallow	Malacothamnus clementinus	Plants	California
261.	San Clemente Island Indian Paintbrush	Castilleja grisea	Plants	California
262.	San Clemente Island Larkspur	Delphinium variegatum ssp. kinkiense	Plants	California
263.	San Clemente Island Woodland-star	Lithophragma maximum	Plants	California
264.	San Clemente Loggerhead Shrike	Lanius ludovicianus mearnsi	Birds	California
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265.	San Diego Ambrosia	Ambrosia pumila	Plants	California, Mexico
266.	San Diego Button-celery	Eryngium aristulatum var. parishii	Plants	California
267.	San Diego Fairy Shrimp	Branchinecta sandiegonensis	Crustaceans	California
268.	San Diego Mesa-mint	Pogogyne abramsii	Plants	California
269.	San Francisco Garter Snake	Thamnophis sirtalis tetrataenia	Reptiles	California
270.	San Francisco Lessingia	Lessingia germanorum	Plants	California
271.	San Jacinto Valley Crownscale	Atriplex coronata var. notatior	Plants	California
272.	San Joaquin Dune Beetle	Coelus gracilis	Insects	California
273.	San Joaquin Kit Fox	Vulpes macrotis mutica	Mammals	California
274.	San Joaquin Wooly-threads	Monolopia congdonii	Plants	California
275.	San Mateo Thornmint	Acanthomintha obovata ssp. duttonii	Plants	California
276.	San Mateo Woolly Sunflower	Eriophyllum latilobum	Plants	California
277.	Sandstone Night Lizard	Xantusia gracilis	Reptiles	California
278.	Sandwort	Arenaria paludicola	Plants	California
279.	Santa Ana River Woolly-star	Eriastrum densifolium ssp. sanctorum	Plants	California
280.	Santa Ana Sucker	Catostomus santaanae	Fishes	California
281.	Santa Barbara Island Liveforever	Dudleya traskiae	Plants	California
282.	Santa Catalina Island Manzanita	Arctostaphylos catalinae	Plants	California
283.	Santa Clara Valley Dudleya	Dudleya setchellii	Plants	California
284.	Santa Cruz Cypress	Cupressus abramsiana	Plants	California
285.	Santa Cruz Island Bush-mallow	Malacothamnus fasciculatus var. nesioticus	Plants	California
286.	Santa Cruz Island Fringepod	Thysanocarpus conchuliferus	Plants	California
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287.	Santa Cruz Island Malacothrix	Malacothrix indecora	Plants	California
288.	Santa Cruz Island Rock-cress	Sibara filifolia	Plants	California
289.	Santa Cruz Long-toed Salamander	Ambystoma macrodactylum croceum	Amphibians	California
290.	Santa Monica Mountains Grasshopper	Trimerotropis occidentaloides	Insects	California
291.	Santa Rosa Island Manzanita	Arctostaphylos confertiflora	Plants	California
292.	Santa Rosa Island Pine	Pinus torreyana	Plants	California
293.	Scottbar Salamander	Plethodon asupak	Amphibians	California
294.	Scotts Valley Polygonum	Polygonum hickmanii	Plants	California
295.	Sea Otter	Enhydra lutris	Mammals	Canada, Japan, Mexico, Russia, United States
296.	Sebastopol Meadowfoam	Limnanthes vinculans	Plants	California
297.	Shasta Crayfish	Pacifastacus fortis	Crustaceans	California
298.	Shasta Salamander	Hydromantes shastae	Amphibians	California
299.	Shortnose Sucker	Chasmistes brevirostris	Fishes	California, Oregon
300.	Showy Indian Clover	Trifolium amoenum	Plants	California
301.	Sierra Nevada Yellow-legged Frog	Rana sierrae	Amphibians	California
302.	Sierra Pygmy Grasshopper	Tetrix sierrane	Insects	California
303.	Siskiyou Mountains Salamander	Plethodon stormi	Amphibians	California, Oregon
304.	Slender-horned Spineflower	Dodecahema leptoceras	Plants	California
305.	Slender-petaled Mustard	Thelypodium stenopetalum	Plants	California
306.	Smith's Blue Butterfly	Euphilotes enoptes smithi	Insects	California
307.	Soft Bird's-Beak	Cordylanthus mollis ssp. mollis	Plants	California
308.	Soft-leaved Indian Paintbrush	Castilleja mollis	Plants	California
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309.	Solano Grass	Tuctoria mucronata	Plants	California
310.	Sonoma Alopecurus	Alopecurus aequalis var. sonomensis	Plants	California
311.	Sonoma Spineflower	Chorizanthe valida	Plants	California
312.	Sonoma Sunshine	Blennosperma bakeri	Plants	California
313.	Sooty Crayfish	Pacifastacus nigrescens	Crustaceans	California
314.	Sooty Shearwater	Ardenna grisea	Birds	Africa, Antarctica, Asia, Australia, Central America, Europe, Middle East, North America (United States Territory), Oceanic, South America
315.	Southwestern Willow Flycatcher	Empidonax traillii extimus	Birds	Arizona, California, Colorado, Mexico, New Mexico, Texas, Utah
316.	Spea hammondii	Spea hammondii	Amphibians	California, Mexico
317.	Speckled Black Salamander	Aneides flavipunctatus	Amphibians	California, Oregon
318.	Sphaerocarpos drewei	Sphaerocarpos drewei	Plants	California
319.	Spotted Owl	Strix occidentalis	Birds	Arizona, California, Canada, Mexico, New Mexico, Texas
320.	Stebbins' Morning-glory	Calystegia stebbinsii	Plants	California
321.	Steelhead	Oncorhynchus mykiss	Fishes	(endangered population southern California Coast), North Pacific Ocean from the Kamchatka Peninsula in Asia to the northern Baja Peninsula
322.	Steller Sea-lion	Eumetopias jubatus	Mammals	Alaska, California, Canada, North Pacific Ocean, Oregon, Russia, Washington
323.	Stephen's Kangaroo Rat	Dipodomys stephensi	Mammals	California
324.	Stephen's Kangaroo Rat	Dipodomys cascus	Mammals	California
325.	Streptocephalus woottoni	Streptocephalus woottoni	Crustaceans	California
326.	Suisun Thistle	Cirsium hydrophilum var. hydrophilum	Plants	California
327.	Tehachapi Slender Salamander	Batrachoseps stebbinsi	Amphibians	California
328.	Thousand Palms Desert Snail	Eremarionta millepalmarum	Snails	California
329.	Tiburon Jewelflower	Streptanthus niger	Plants	California
330.	Tiburon Paintbrush	Castilleja affinis ssp. neglecta	Plants	California
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331.	Tidewater Goby	Eucyclogobius newberryi	Fishes	California
332.	Tight Coin	Ammonitella yatesii	Snails	California
333.	Tricolored Blackbird	Agelaius tricolor	Birds	Mexico, United States (California)
334.	Trinity Bristle Snail	Monadenia setosa	Snails	California
335.	Triple-ribbed Milk-vetch	Astragalus tricarinatus	Plants	California
336.	Unarmored Threespine Stickleback	Gasterosteus aculeatus williamsoni	Fishes	California
337.	Ventura Marsh Milk-vetch	Astragalus pycnostachyus var. lanosissimus	Plants	California
338.	Vernal Pool Fairy Shrimp	Branchinecta lynchi	Crustaceans	California, Oregon
339.	Vernal Pool Tadpole Shrimp	Lepidurus packardi	Crustaceans	California
340.	Vine Hill Clarkia	Clarkia imbricata	Plants	California
341.	Wandering Salamander	Aneides vagrans	Amphibians	California, Canada (British Columbia)
342.	Wengeror's Cave Amphipod	Stygobromus wengerorum	Crustaceans	California
343.	Western Lily	Lilium occidentale	Plants	California, Oregon
344.	Western Toad	Anaxyrus boreas	Amphibians	Canada, Mexico, United States (California)
345.	Whale Shark	Rhincodon typus	Fishes	Africa, American Samoa, Asia, Australia, Central America, Middle East, Oceanic, South America
346.	White Abalone	Haliotis sorenseni	Snails	North America (West Coast from Point Conception, CA, USA, to Punta Abreojos, Baja Californa, Mexico)
347.	White Desert Snail	Eremarionta immaculata	Snails	California
348.	White-eared Pocket Mouse	Perognathus alticolus	Mammals	California
349.	White-rayed Pentachaeta	Pentachaeta bellidiflora	Plants	California
350.	Whitebark Pine	Pinus albicaulis	Plants	Canada, United States
351.	Willowy Monardella	Monardella linoides ssp. viminea	Plants	California, Mexico
352.	Woolly Meadowfoam	Limnanthes floccosa	Plants	California
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353.	Wreathed Cactus Snail	Xerarionta redimita	Snails	California
354.	Xantus's Murrelet	Synthliboramphus hypoleucus	Birds	California, Canada, Mexico, Washington
355.	Yadon's Piperia	Piperia yadonii	Plants	California
356.	Yellow Larkspur	Delphinium luteum	Plants	California
357.	Yosemite Toad	Anaxyrus canorus	Amphibians	California
358.	Yreka Phlox	Phlox hirsuta	Plants	California
359.	Zayante Band-winged Grasshopper	Trimerotropis infantilis	Insects	California
360.	Zerene Fritillary	Speyeria zerene	Insects	California