Simulium craigi
Simuliidae > Diptera > Insecta
Simulium decorum
Simuliidae > Diptera > Insecta
Simulium exulatum
Simuliidae
Simulium hunteri
Simuliidae
Simulium irritatum
Simuliidae
Simulium pilosum
Simuliidae > Diptera > Insecta
Simulium piperi
Simuliidae
Simulium silvestre
Simuliidae
Simulium tuberosum
Simuliidae > Diptera > Insecta
Simulium venustrum
Simuliidae
Sinningia
Gesneriaceae
Skiff milkvetch
Skiff milkvetch —
Skolithos
trace fossil —
Smithella
Syntrophaceae > Syntrophobacterales > Deltaproteobacteria
Snowy plover
snowy plover —
Solanum tuberosum
potato — Solanaceae > Solanales > Magnoliopsida
Sorex cinereus
Masked Shrew — Soricidae > Eulipotyphla > Mammalia
Sorex palustris
water shrew — Soricidae > Eulipotyphla > Mammalia
Sorex vagrans
vagrant shrew — Soricidae > Eulipotyphla > Mammalia
Sorghastrum nutans
Indian grass — Poaceae > Poales > Magnoliopsida
Spartina pectinata
Prairie cordgrass — Poaceae > Poales > Magnoliopsida
Spermophilus townsendii mollis
Spirogyra
Spodoptera frugiperda
Noctuidae
Stelis foederalis
Megachilidae > Hymenoptera > Insecta
Stelis subemarginata
Megachilidae
Stenonema
mayfly —
Stewartina
Stipa
Needlegrass — Poaceae > Poales > Magnoliopsida
Stipa aliena
Streptococcus bovis
Streptococcaceae > Lactobacillales > Bacilli
Strix occidentalis caurina
Owl, Northern Spotted — Strigidae > Strigiformes > Aves
Sus domesticus
pig — Suidae > Artiodactyla > Mammalia
Swertia perennis
Symbiocladius rhithrogenae
Syntrophorhabdus aromaticivorans
Syntrophorhabdaceae > Syntrophobacterales > Deltaproteobacteria
Syntrophus aciditrophicus
Syntrophaceae
Syringa X chinensis
Oleaceae > Lamiales > Magnoliopsida
Syringa vulgaris
Lilac — Oleaceae > Lamiales > Magnoliopsida
Taeniatherum caput-medusae
medusahead — Poaceae > Poales > Magnoliopsida
Tamiasciurus hudsonicus fremonti
Squirrel — Sciuridae > Rodentia > Mammalia
Teichichnus
trace fossil —
Tetradymia canescens
gray horsebrush — Asteraceae > Asterales > Magnoliopsida
Thalassinoides
trace fossil —
Thermopsis fendleri
Thlapsi caerulescens
Thurber fescue
Thurber fescue —
Trichichnus
trace fossil —
Trifolium alpinum
Fabaceae > Fabales > Magnoliopsida
Trifolium dasyphyllum
clover — Fabaceae > Fabales > Magnoliopsida