Custom Species Lists
- Myodes gapperi - (Southern Red-backed Vole)
- Spartium junceum - (Spanish Broom)
- Thymelaea passerina - (Sparrow Weed)
- Alnus incana - (Speckled Alder)
- Citharichthys stigmaeus - (Speckled Sanddab)
- Physeter macrocephalus - (Sperm Whale)
- Sphagnum spp. - (Sphagnum)
- Dryopteris carthusiana - (Spinulose Shieldfern)
- Xanthium spinosum - (Spiny Cocklebur)
- Carduus acanthoides - (Spiny Plumeless-thistle)
- Chlamys hastata - (Spiny Scallop)
- Hippasteria spinosa - (Spiny Star)
- Poraniopsis inflata - (Spiny Star)
- Bathyagonus infraspinatus - (Spinycheek Starsnout)
- Dasycottus setiger - (Spinyhead Sculpin)
- Asemichthys taylori - (Spinynose Sculpin)
- Coptis aspleniifolia - (Spleenwortleaf Goldthread)
- Sebastes diploproa - (Splitnose Rockfish)
- Icelinus tenuis - (Spotfin Sculpin)
- Hypochaeris radicata - (Spotted Cat's-ear)
- Chilara taylori - (Spotted cusk-eel)
- Eutrochium maculatum var. bruneri - (Spotted Joepyeweed)
- Centaurea stoebe - (Spotted Knapweed)
- Strix occidentalis - (Spotted Owl)
- Hydrolagus colliei - (Spotted Ratfish)
- Actitis macularius - (Spotted Sandpiper)
- Liparis callyodon - (Spotted Snailfish)
- Pipilo maculatus - (Spotted Towhee)
- Drosophila suzukii - (Spotted-wing Drosophila)
- Falcipennis canadensis - (Spruce Grouse)
- Daphne laureola - (Spurge-laurel)
- Vaccinium membranaceum - (Square-twigged Huckleberry)
- Munida quadrispina - (Squat Lobster)
- Macoma inquinata - (Stained Macoma)
- Botrychium pedunculosum - (Stalked Moonwort)
- Platichthys stellatus - (Starry Flounder)
- Raja stellulata - (Starry Skate)
- Oncorhynchus mykiss pop. 37 - (Steelhead - Puget Sound)
- Mesoplodon stejnegeri - (Stejneger's Beaked Whale)
- Eumetopias jubatus - (Steller Sea Lion)
- Cyanocitta stelleri - (Steller's Jay)
- Oxytropis borealis var. viscida - (Sticky Crazyweed)
- Calidris himantopus - (Stilt Sandpiper)
- Eremophila alpestris strigata - (Streaked Horned Lark)
- Urticina spp. - (Striped Anemone)
- Morone saxatilis - (Striped Bass)
- Stenella coeruleoalba - (Striped Dolphin)
- Gibbonsia metzi - (Striped Kelpfish)
- Embiotoca lateralis - (Striped Seaperch)
- Mephitis mephitis - (Striped Skunk)
- Sebastes saxicola - (Stripetail Rockfish)
- Rossia pacifica - (Stubby Squid)
- Podothecus accipenserinus - (Sturgeon Poacher)
- Abies lasiocarpa - (Subalpine Fir)
- Larix lyallii - (Subalpine Larch)
- Lupinus arcticus ssp. subalpinus - (Subalpine Lupine)
- Potentilla recta - (Sulphur Cinquefoil)
- Solaster spp. - (Sun Star)
- Pycnopodia helianthoides - (Sunflower Star)
- Melanitta perspicillata - (Surf Scoter)
- Hypomesus pretiosus - (Surf Smelt)
- Aphriza virgata - (Surfbird)
- Buteo swainsoni - (Swainson's Hawk)
- Catharus ustulatus - (Swainson's Thrush)
- Myrica gale - (Sweet Bayberry)
- Foeniculum vulgare - (Sweet Fennel)
- Chlamys spp. - (Swimming Scallops)
- Zygophyllum fabago - (Syrian Bean-caper)
- Psychrolutes paradoxus - (Tadpole Sculpin)
- Nectoliparis pelagicus - (Tadpole Snailfish)
- Lyrodus takanoshimensis - (Takanoshima Shipworm)
- Agoseris elata - (Tall Agoseris)
- Gypsophila paniculata - (Tall Baby's-breath)
- Actaea elata var. elata - (Tall Bugbane)
- Senecio jacobaea - (Tansy Ragwort)
- Euphydryas editha taylori - (Taylor's Checkerspot)
- Tinca tinca - (Tench)
- Thamnophis elegans - (Terrestrial Gartersnake)
- Nuttallanthus texanus - (Texas Toadflax)
- Larus thayeri - (Thayer's Gull)
- Rubus parviflorus - (Thimbleberry)
- Chaenactis thompsonii - (Thompson's Pincushion)
- Erigeron peregrinus var. thompsonii - (Thompson's Wandering Daisy)
- Paricelinus hopliticus - (Thornback sculpin)
- Icelinus filamentosus - (Threadfin Sculpin)
- Schoenoplectus americanus - (Three-square Bulrush)
- Schoenoplectus pungens - (Three-square Bulrush)
- Gasterosteus aculeatus - (Threespine Stickleback)
- Dulichium arundinaceum - (Threeway Sedge)
- Alopias vulpinus - (Thresher Shark)
- Oligocottus maculosus - (Tidepool Sculpin)
- Liparis florae - (Tidepool Snailfish)
- Sebastes nigrocinctus - (Tiger Rockfish)
- Hypericum anagalloides - (Tinker's-penny)
- Macoma balthica - (Tiny Pink Clam)
- Saxifraga tolmiei - (Tolmie's Saxifrage)
- Rotala ramosior - (Toothcup)
- Lathyrus torreyi - (Torrey's Peavine)
- Phyllospadix torreyi - (Torrey's Surf-grass)
- Corynorhinus townsendii - (Townsend's Big-eared Bat)