Union Reservoir
Colorado · Rocky Mountains
About This Location
Union Reservoir is a productive birding destination in Colorado, with 281 species recorded on eBird. This lake habitat attracts American White Pelican, Canada Goose, and Mallard among many others. Elevation changes create diverse habitats, from riparian valleys to alpine meadows, supporting a wide range of species.
Location
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Notable Species
Live Bird Data
Powered by eBird / Cornell Lab of Ornithology
Notable Sightings
Rare or unusual species spotted nearby in the last 14 days
Eastern Warbling Vireo
Vireo gilvus
Brown Thrasher
Toxostoma rufum
Red Crossbill (Ponderosa Pine or type 2)
Loxia curvirostra
Northern Cardinal
Cardinalis cardinalis
Pine Siskin
Spinus pinus
Brewer's Sparrow
Spizella breweri
Broad-winged Hawk
Buteo platypterus
Solitary Sandpiper
Tringa solitaria
Western Sandpiper
Calidris mauri
Northern Pintail
Anas acuta
Upland Sandpiper
Bartramia longicauda
Recent Observations
Species reported at this location in the last 14 days
Mourning Dove
Killdeer
Spotted Sandpiper
Ring-billed Gull
Western Grebe
Great Blue Heron
American White Pelican
Red-tailed Hawk
Cliff Swallow
House Finch
Yellow-headed Blackbird
Red-winged Blackbird
Brown-headed Cowbird
Great-tailed Grackle
Northern Shoveler
Mallard
Green-winged Teal
Rock Pigeon
Sora
Lesser Yellowlegs
Birding Tips
- 1
Scan the water surface methodically for diving ducks, loons, and grebes.
- 2
Check the shoreline and mudflats for shorebirds and wading birds.
- 3
Acclimate to altitude before hiking to high-elevation birding spots.
Amenities
More in Colorado
Rocky Mountain National Park
Colorado alpine park with accessible tundra birding and elevation-diverse habitats.
Pawnee National Grassland
Colorado shortgrass prairie with grassland specialists and nesting raptors at Pawnee Buttes.
Adobe Creek Reservoir (Blue Lake) - Bent Co
Lake birding hotspot in Colorado with 227 recorded species.
Colorado Birding Guide
Complete guide to birding in Colorado →