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
Black Phoebe
Sayornis nigricans
Acorn Woodpecker
Melanerpes formicivorus
Semipalmated Plover
Charadrius semipalmatus
Semipalmated Sandpiper
Calidris pusilla
Wilson's Phalarope
Phalaropus tricolor
Broad-tailed Hummingbird
Selasphorus platycercus
Forster's Tern
Sterna forsteri
Willet
Tringa semipalmata
Recent Observations
Species reported at this location in the last 14 days
Northern Shoveler
Gadwall
Green-winged Teal
Mourning Dove
Killdeer
Marbled Godwit
Franklin's Gull
Ring-billed Gull
California Gull
American White Pelican
Osprey
Bald Eagle
Red-tailed Hawk
American Kestrel
American Crow
Horned Lark
European Starling
American Robin
House Finch
Song Sparrow
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 →