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 Phoebe
Sayornis phoebe
Eastern Warbling Vireo
Vireo gilvus
Long-billed Dowitcher
Limnodromus scolopaceus
Canvasback
Aythya valisineria
Blackburnian Warbler
Setophaga fusca
Common Goldeneye
Bucephala clangula
Recent Observations
Species reported at this location in the last 14 days
Canada Goose
Cinnamon Teal
Gadwall
Mallard
Rock Pigeon
Eurasian Collared-Dove
Mourning Dove
American Avocet
Killdeer
Long-billed Dowitcher
Spotted Sandpiper
Baird's Sandpiper
Ring-billed Gull
Eared Grebe
Western Grebe
Clark's Grebe
American White Pelican
Osprey
Northern Harrier
Bald Eagle
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 →