The Rio Grande Headwaters Subbasin

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Tracked elements of biodiversity include animals, plants, and natural communities that are uncommon either globally or within the state of Colorado. The list below includes all wetland and riparian dependent elements found within the subbasin and the count of known occurrences.

• Heritage Program Ranking System
• CNHP Tracking Lists for all Elements

• Amphibians

State Scientific Name	State Common Name	GRank	SRank	Count
Anaxyrus boreas pop. 1	Boreal Toad (Southern Rocky Mountain Population)	G4T1Q	S1	8

• Birds

State Scientific Name	State Common Name	GRank	SRank	Count
Cypseloides niger	Black Swift	G4	S3B	2
Haliaeetus leucocephalus	Bald Eagle	G5	S1B,S3N	2

• Fish

State Scientific Name	State Common Name	GRank	SRank	Count
Gila pandora	Rio Grande Chub	G3	S1?	4
Oncorhynchus clarkii virginalis	Rio Grande Cutthroat Trout	G4T3	S3	26

• Mollusks

State Scientific Name	State Common Name	GRank	SRank	Count
Valvata sincera	Mossy Valvata	G5	S3	1

• Natural Communities

State Scientific Name	State Common Name	GRank	SRank	Count
Alnus incana - Salix (monticola, lucida, ligulifolia) Shrubland	Thinleaf Alder-Mixed Willow Species	G3	S3	2
Alnus incana - Salix drummondiana Shrubland	Montane Riparian Shrubland	G3	S3	7
Alnus incana / Cornus sericea Shrubland	Thinleaf Alder-Red-osier Dogwood Riparian Shrubland	G3G4	S3	1
Alnus incana / Mesic Forbs Shrubland	Thinleaf Alder/Mesic Forb Riparian Shrubland	G3	S3	2
Picea pungens / Alnus incana Woodland	Montane Riparian Forests	G3	S3	3
Populus angustifolia - Picea pungens / Alnus incana Woodland	Montane Riparian Forests	G3	S3	2
Populus angustifolia / Alnus incana Woodland	Montane Riparian Forest	G3	S3	2
Populus angustifolia / Salix (monticola, drummondiana, lucida) Woodland	Narrowleaf Cottonwood/Mixed Willows Montane Riparian Forest	G3	S2	2
Populus tremuloides / Alnus incana Forest	Montane Riparian Forests	G3	S3	1
Salix boothii / Mesic Forbs Shrubland	Booth's Willow/Mesic Forb	G3	S3	3
Salix drummondiana / Calamagrostis canadensis Shrubland	Lower Montane Willow Carrs	G3	S3	2
Salix geyeriana / Calamagrostis canadensis Shrubland	Montane Riparian Willow Carr	G5	S2	2
Salix geyeriana / Carex utriculata Shrubland	Geyer's Willow/Beaked Sedge	G5	S2	2
Salix lucida ssp. caudata Shrubland [Provisional]	Montane Riparian Shrubland	G3Q	S2	1
Salix monticola / Calamagrostis canadensis Shrubland	Montane Willow Carr	G3	S3	1
Salix monticola / Carex aquatilis Shrubland	Montane Riparian Willow Carr	G3	S2	2
Salix monticola / Mesic Graminoids Shrubland	Montane Riparian Willow Carr	G3	S3	4
Salix planifolia / Mesic Forbs Shrubland [Provisional]	Planeleaf Willow/Mesic Forbs	G4	S2	3
Salix wolfii / Mesic Forbs Shrubland	Subalpine Riparian Willow Carr	G3	S3	3
Sparganium angustifolium Herbaceous Vegetation	Montane Floating/submergent Palustrine Wetlands	G4	S2	1

• Vascular Plants

State Scientific Name	State Common Name	GRank	SRank	Count
Erigeron philadelphicus	Philadelphia fleabane	G5	S1	1
Eriophorum altaicum var. neogaeum	Altai cottongrass	G4?T3T4	S3	1