Background
Back to Colorado, USA

Union Reservoir

Located in the Colorado, USA area, Union Reservoir is a popular birding destination. Recently, birders have spotted Canada Goose, Blue-winged Teal, Mallard in the area.

301
All-Time Species
67
Sightings (14 days)
Colorado
Region
United States
Country

Location Map

Loading Map...

Live eBird Sightings

Trailing 14 Days
Species
Date Spotted
Count
Canada GooseBranta canadensis
Oct 15, 2026
4
Blue-winged TealSpatula discors
Oct 15, 2026
7
MallardAnas platyrhynchos
Oct 15, 2026
12
Rock PigeonColumba livia
Oct 15, 2026
20
American CootFulica americana
Oct 15, 2026
30
American AvocetRecurvirostra americana
Oct 15, 2026
1
KilldeerCharadrius vociferus
Oct 15, 2026
2
Long-billed DowitcherLimnodromus scolopaceus
Oct 15, 2026
5
Sabine's GullXema sabini
Oct 15, 2026
1
Ring-billed GullLarus delawarensis
Oct 15, 2026
60
Horned GrebePodiceps auritus
Oct 15, 2026
1
Eared GrebePodiceps nigricollis
Oct 15, 2026
15
Western GrebeAechmophorus occidentalis
Oct 15, 2026
200
Clark's GrebeAechmophorus clarkii
Oct 15, 2026
2
American White PelicanPelecanus erythrorhynchos
Oct 15, 2026
6
Red-tailed HawkButeo jamaicensis
Oct 15, 2026
2
American KestrelFalco sparverius
Oct 15, 2026
1
Say's PhoebeSayornis saya
Oct 15, 2026
1
Blue JayCyanocitta cristata
Oct 15, 2026
1
European StarlingSturnus vulgaris
Oct 15, 2026
4
Western MeadowlarkSturnella neglecta
Oct 15, 2026
2
Common GrackleQuiscalus quiscula
Oct 15, 2026
7
GadwallMareca strepera
Oct 15, 2026
1
Oct 15, 2026
2
Bonaparte's GullChroicocephalus philadelphia
Oct 15, 2026
2
Northern HarrierCircus hudsonius
Oct 15, 2026
1
Bald EagleHaliaeetus leucocephalus
Oct 15, 2026
4
Northern FlickerColaptes auratus
Oct 15, 2026
2
Black-capped ChickadeePoecile atricapillus
Oct 15, 2026
2
House SparrowPasser domesticus
Oct 15, 2026
4
House FinchHaemorhous mexicanus
Oct 15, 2026
3
White-crowned SparrowZonotrichia leucophrys
Oct 15, 2026
3
Red-winged BlackbirdAgelaius phoeniceus
Oct 15, 2026
3
Brewer's BlackbirdEuphagus cyanocephalus
Oct 15, 2026
37
Yellow-rumped WarblerSetophaga coronata
Oct 15, 2026
1
Franklin's GullLeucophaeus pipixcan
Oct 15, 2026
2
American CrowCorvus brachyrhynchos
Oct 15, 2026
2
Lesser YellowlegsTringa flavipes
Oct 13, 2026
1
Greater YellowlegsTringa melanoleuca
Oct 13, 2026
2
Snowy EgretEgretta thula
Oct 13, 2026
5
Great Blue HeronArdea herodias
Oct 13, 2026
3
Horned LarkEremophila alpestris
Oct 13, 2026
1
Song SparrowMelospiza melodia
Oct 13, 2026
1
Yellow-headed BlackbirdXanthocephalus xanthocephalus
Oct 13, 2026
2
Northern ShovelerSpatula clypeata
Oct 13, 2026
14
Eurasian Collared-DoveStreptopelia decaocto
Oct 13, 2026
2
Mourning DoveZenaida macroura
Oct 13, 2026
1
Belted KingfisherMegaceryle alcyon
Oct 13, 2026
1
American RobinTurdus migratorius
Oct 13, 2026
1
BuffleheadBucephala albeola
Oct 13, 2026
2
Pied-billed GrebePodilymbus podiceps
Oct 13, 2026
4
Ruddy DuckOxyura jamaicensis
Oct 13, 2026
5
Cooper's HawkAstur cooperii
Oct 13, 2026
1
Downy WoodpeckerDryobates pubescens
Oct 13, 2026
1
American PipitAnthus rubescens
Oct 13, 2026
1
Red PhalaropePhalaropus fulicarius
Oct 12, 2026
1
Red-necked PhalaropePhalaropus lobatus
Oct 12, 2026
1
Marbled GodwitLimosa fedoa
Oct 12, 2026
1
California GullLarus californicus
Oct 12, 2026
1
Double-crested CormorantNannopterum auritum
Oct 12, 2026
1
Chipping SparrowSpizella passerina
Oct 11, 2026
1
Brown-headed CowbirdMolothrus ater
Oct 10, 2026
2
Black-necked StiltHimantopus mexicanus
Oct 3, 2026
2
Least SandpiperCalidris minutilla
Oct 3, 2026
2
Ruby-crowned KingletCorthylio calendula
Oct 3, 2026
1
White-breasted NuthatchSitta carolinensis
Oct 3, 2026
1
Wilson's WarblerCardellina pusilla
Oct 3, 2026
3

Explore More in Colorado, USA

Loading sightings...

💬 Discussion

Loading comments...

Enter your name and email to join the discussion

Your email is kept private and never shared.

★ Best Value

Complete Birder's Kit

6 premium field guides & logbooks — regional hotspots, species checklists, trip planners, and more. Everything you need in the field.

One-time purchase

$59$112.94
Get the Bundle

Plan Your Visit

Smart Trip Planner

Build a custom day-by-day itinerary centred around Union Reservoir.

Build Itinerary

Get Birding Alerts

Rare sightings near Union Reservoir, new field guides, and seasonal tips.

No spam, ever. Unsubscribe anytime.