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5,782 species in Rocky Mountain National Park
Spilogale gracilis
Spizella pusilla
Stamnodes formosata
Stemonitis flavogenita
Stenodynerus anormis
Stenus niveus
Stereocaulon alpinum
Sterna hirundo
Stictoleptura canadensis
Stuckenia vaginata
Symmorphus cristatus
Symphyotrichum boreale
Sympistis glennyi
Syritta pipiens
Syrphus ribesii
Tapesia rosae
Taphrina confusa
Tebenna gnaphaliella
Tetradymia canescens
Thamnophis ordinoides
Thanatophilus coloradensis
Thereva krafti
Tonestus lyallii
Toninia squalida
Tortella arctica
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