Bassariscus astutus
Ringtall — Procyonidae > Carnivora > Mammalia
Berberis repens
creeping barberry — Berberidaceae > Ranunculales > Magnoliopsida
Bison antiquus
bison —
Bistorta bistortoides
Bistort — Polygonaceae > Caryophyllales > Magnoliopsida
Bistorta vivipara
bistort — Polygonaceae > Caryophyllales > Magnoliopsida
Black-headed grosbeak
Black-headed grosbeak —
Boloria improba acrocnema
Uncompahgre Fritillary butterfly — Nymphalidae > Lepidoptera > Insecta
Bombus ternarius
Apidae > Hymenoptera > Insecta
Brewer's Sparrow
Brewer's Sparrow —
California gulls
California gulls —
Calopteryx splendens
Calopterygidae
Campsis radicans
Bignoniaceae > Lamiales > Magnoliopsida
Canada Thistle
Canada Thistle —
Canadian Lynx
Canadian Lynx —
Candida albicans
Canis dirus
dire wolves —
Carex bigelowii ssp. lugens
Cyperaceae > Poales > Magnoliopsida
Carolina chickadee
Carolina chickadee —
Ceratophyllum demersum
coontail — Ceratophyllaceae > Ceratophyllales > Magnoliopsida
Chamerion latifolium
river beauty — Onagraceae > Myrtales > Magnoliopsida
Chelone
Plantaginaceae > Lamiales > Magnoliopsida
Circotettix rabula
crackler —
Cirsium canescens
Asteraceae > Asterales > Magnoliopsida
Cirsium vulgare
Asteraceae > Asterales > Magnoliopsida
Cladophora
Cladophoraceae > Cladophorales > Ulvophyceae
Clintonia borealis
Liliaceae > Liliales > Magnoliopsida
Coelioxys sodalis
Megachilidae > Hymenoptera > Insecta
Colorado Blue Spruce
Colorado Blue Spruce —
Colorado River fishes
Colorado River fishes —
Common merganser
Common merganser —
Cornus sericea
Cucumis sativus
cucumber — Cucurbitaceae > Cucurbitales > Magnoliopsida
Cyprinus carpio
Carp — Cyprinidae > Cypriniformes > Teleostei
Dactylorhiza incarnata
Orchidaceae > Asparagales > Magnoliopsida
Descurainia sp.
Dianthidium heterulkei
Megachilidae > Hymenoptera > Insecta
Draba japonica
Brassicaceae
Eichhornia crassipes
water hyacinth —
Eleocharis
spikerush —
Eleocharis palustris
creeping spikerush — Cyperaceae > Poales > Magnoliopsida
Empetrum nigrum
Ericaceae > Ericales > Magnoliopsida
Enallagma hageni
damselfly — Coenagrionidae > Odonata > Insecta
Eostaffella
Eptesicus fuscus
big brown bat —
Equisetum arvense
Erigeron eatonii
Eaton's fleabane — Asteraceae > Asterales > Magnoliopsida
Eriogonum racemosum
raceme buckwheat — Polygonaceae > Caryophyllales > Magnoliopsida
Erythronium albidum
Liliaceae
Eucephalus engelmannii
Asteraceae > Asterales > Magnoliopsida
Euryarchaeota
Thermoplasmata