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Union Reservoir

Located in the Colorado, USA area, Union Reservoir is a popular birding destination. Recently, birders have spotted Mallard, Green-winged Teal, Eurasian Collared-Dove in the area.

300
All-Time Species
86
Sightings (14 days)
Colorado
Region
United States
Country

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Live eBird Sightings

Trailing 14 Days
Species
Date Spotted
Count
MallardAnas platyrhynchos
Sep 1, 2026
10
Sep 1, 2026
4
Eurasian Collared-DoveStreptopelia decaocto
Sep 1, 2026
1
Mourning DoveZenaida macroura
Sep 1, 2026
2
American CootFulica americana
Sep 1, 2026
4
KilldeerCharadrius vociferus
Sep 1, 2026
40
Spotted SandpiperActitis macularius
Sep 1, 2026
1
Greater YellowlegsTringa melanoleuca
Sep 1, 2026
1
Baird's SandpiperCalidris bairdii
Sep 1, 2026
4
Least SandpiperCalidris minutilla
Sep 1, 2026
6
Western SandpiperCalidris mauri
Sep 1, 2026
2
Ring-billed GullLarus delawarensis
Sep 1, 2026
100
Western GrebeAechmophorus occidentalis
Sep 1, 2026
100
Clark's GrebeAechmophorus clarkii
Sep 1, 2026
1
Snowy EgretEgretta thula
Sep 1, 2026
8
Great EgretArdea alba
Sep 1, 2026
9
Great Blue HeronArdea herodias
Sep 1, 2026
4
American White PelicanPelecanus erythrorhynchos
Sep 1, 2026
30
OspreyPandion haliaetus
Sep 1, 2026
1
Swainson's HawkButeo swainsoni
Sep 1, 2026
1
Barn SwallowHirundo rustica
Sep 1, 2026
6
Cliff SwallowPetrochelidon pyrrhonota
Sep 1, 2026
8
European StarlingSturnus vulgaris
Sep 1, 2026
150
House FinchHaemorhous mexicanus
Sep 1, 2026
2
Vesper SparrowPooecetes gramineus
Sep 1, 2026
1
Song SparrowMelospiza melodia
Sep 1, 2026
1
Red-winged BlackbirdAgelaius phoeniceus
Sep 1, 2026
1
Canada GooseBranta canadensis
Sep 1, 2026
25
Rock PigeonColumba livia
Sep 1, 2026
9
SoraPorzana carolina
Sep 1, 2026
1
Double-crested CormorantNannopterum auritum
Sep 1, 2026
1
Red-tailed HawkButeo jamaicensis
Sep 1, 2026
4
Downy WoodpeckerDryobates pubescens
Sep 1, 2026
2
Northern FlickerColaptes auratus
Sep 1, 2026
3
Western Wood-PeweeContopus sordidulus
Sep 1, 2026
3
Say's PhoebeSayornis saya
Sep 1, 2026
2
Black-capped ChickadeePoecile atricapillus
Sep 1, 2026
3
Tree SwallowTachycineta bicolor
Sep 1, 2026
1
White-breasted NuthatchSitta carolinensis
Sep 1, 2026
2
Gray CatbirdDumetella carolinensis
Sep 1, 2026
1
House SparrowPasser domesticus
Sep 1, 2026
1
American GoldfinchSpinus tristis
Sep 1, 2026
1
Chipping SparrowSpizella passerina
Sep 1, 2026
1
Brown-headed CowbirdMolothrus ater
Sep 1, 2026
4
Common GrackleQuiscalus quiscula
Sep 1, 2026
1
Orange-crowned WarblerLeiothlypis celata
Sep 1, 2026
1
Common YellowthroatGeothlypis trichas
Sep 1, 2026
3
Northern Yellow WarblerSetophaga aestiva
Sep 1, 2026
1
Townsend's WarblerSetophaga townsendi
Sep 1, 2026
1
Wilson's WarblerCardellina pusilla
Sep 1, 2026
4
Western TanagerPiranga ludoviciana
Sep 1, 2026
1
Blue GrosbeakPasserina caerulea
Sep 1, 2026
1
Solitary SandpiperTringa solitaria
Aug 30, 2026
1
Semipalmated SandpiperCalidris pusilla
Aug 30, 2026
19
Bald EagleHaliaeetus leucocephalus
Aug 30, 2026
1
American KestrelFalco sparverius
Aug 30, 2026
4
Western KingbirdTyrannus verticalis
Aug 30, 2026
1
Northern MockingbirdMimus polyglottos
Aug 30, 2026
5
American RobinTurdus migratorius
Aug 30, 2026
4
Clay-colored SparrowSpizella pallida
Aug 30, 2026
13
Lincoln's SparrowMelospiza lincolnii
Aug 30, 2026
1
Yellow-headed BlackbirdXanthocephalus xanthocephalus
Aug 30, 2026
150
Blue-winged TealSpatula discors
Aug 27, 2026
2
Northern HarrierCircus hudsonius
Aug 27, 2026
2
Blue JayCyanocitta cristata
Aug 27, 2026
1
Northern ShovelerSpatula clypeata
Aug 25, 2026
5
Black-chinned HummingbirdArchilochus alexandri
Aug 25, 2026
1
California GullLarus californicus
Aug 25, 2026
1
Eastern KingbirdTyrannus tyrannus
Aug 25, 2026
1
Bank SwallowRiparia riparia
Aug 25, 2026
3
Western MeadowlarkSturnella neglecta
Aug 25, 2026
2
Red-breasted NuthatchSitta canadensis
Aug 25, 2026
1
Belted KingfisherMegaceryle alcyon
Aug 24, 2026
1
Loggerhead ShrikeLanius ludovicianus
Aug 23, 2026
1
Horned LarkEremophila alpestris
Aug 23, 2026
2
Lark SparrowChondestes grammacus
Aug 23, 2026
1
GadwallMareca strepera
Aug 22, 2026
1
Lesser YellowlegsTringa flavipes
Aug 22, 2026
5
Franklin's GullLeucophaeus pipixcan
Aug 22, 2026
2
Black TernChlidonias niger
Aug 22, 2026
2
Great-tailed GrackleQuiscalus mexicanus
Aug 22, 2026
1
Broad-tailed HummingbirdSelasphorus platycercus
Aug 21, 2026
1
Pied-billed GrebePodilymbus podiceps
Aug 21, 2026
1
Pine SiskinSpinus pinus
Aug 21, 2026
1
Brewer's SparrowSpizella breweri
Aug 21, 2026
1
Yellow-rumped WarblerSetophaga coronata
Aug 20, 2026
1

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