Birds to See in Colorado in August
145 bird species on our list for Colorado are recorded regularly in August
Of these, the most often recorded are House Finch, Mourning Dove, Northern Flicker, American Robin and Barn Swallow. New this month: Northern Shoveler, Eurasian Teal, Northern Pintail and Clay-colored Sparrow and 17 more.
On the move in August
GBIF · AugArriving
At their peak
Leaving soon
From Colorado’s bird records, 2019–2024: arriving birds are regular this month but not last; leaving birds are regular this month but not next.
Other months
All 145 birds in August
145 birds
House FinchHaemorhous mexicanusResidentCommon13–15 cmRecorded all year · 2.70% in Aug
Mourning DoveZenaida macrouraSummer visitorCommon23–34 cmRecorded all year · 2.57% in Aug
Northern FlickerColaptes auratusResidentCommon28–31 cmRecorded all year · 2.40% in Aug
American RobinTurdus migratoriusResidentCommon20–28 cmRecorded all year · 2.22% in Aug
Barn SwallowHirundo rusticaSummer visitorCommon17–19 cmRegularly Apr–Oct · 2.15% in Aug
MallardAnas platyrhynchosResidentCommon50–65 cmRecorded all year · 1.92% in Aug
American CrowCorvus brachyrhynchosResidentCommon41–53 cmRecorded all year · 1.65% in Aug
Eurasian Collared DoveStreptopelia decaoctoResidentCommon30–32 cmRecorded all year · 1.61% in Aug
Red-tailed HawkButeo jamaicensisResidentCommon45–65 cmRecorded all year · 1.52% in Aug
Canada GooseBranta canadensisResidentCommon76–110 cmRecorded all year · 1.50% in Aug
Blue JayCyanocitta cristataResidentCommon25–30 cmRecorded all year · 1.48% in Aug
Red-winged BlackbirdAgelaius phoeniceusResidentCommon17–23 cmRecorded all year · 1.43% in Aug
White-breasted NuthatchSitta carolinensisResidentCommon13–14 cmRecorded all year · 1.42% in Aug
Great Blue HeronArdea herodiasResidentCommon91–137 cmRecorded all year · 1.32% in Aug
Chipping SparrowSpizella passerinaSummer visitorCommon12–15 cmRegularly Apr–Oct · 1.27% in Aug
Common RavenCorvus coraxResidentCommon54–67 cmRecorded all year · 1.20% in Aug
Northern Yellow WarblerSetophaga aestivaSummer visitorCommon12–13 cmRegularly May–Sep · 1.18% in Aug
Turkey VultureCathartes auraSummer visitorCommon62–81 cmRegularly Mar–Oct · 1.12% in Aug
Common StarlingSturnus vulgarisResidentCommon21–23 cmRecorded all year · 1.08% in Aug
Downy WoodpeckerDryobates pubescensResidentCommon14–18 cmRecorded all year · 1.07% in Aug
Western KingbirdTyrannus verticalisSummer visitorCommon20–24 cmRegularly Apr–Sep · 1.06% in Aug
House SparrowPasser domesticusResidentCommon14–17 cmRecorded all year · 1.02% in Aug
Say's PhoebeSayornis sayaSummer visitorCommon17–20 cmRecorded all year · 0.96% in Aug
Ring-billed GullLarus delawarensisWinter visitorCommon43–54 cmRegularly Jul–May · 0.83% in Aug
Lark SparrowChondestes grammacusSummer visitorCommon15–17 cmRegularly Apr–Sep · 0.78% in Aug
Song SparrowMelospiza melodiaResidentCommon12–17 cmRecorded all year · 0.78% in Aug
Rock DoveColumba liviaResidentCommon29–37 cmRecorded all year · 0.77% in Aug
Pine SiskinSpinus pinusResidentCommon11–14 cmRecorded all year · 0.76% in Aug
Western MeadowlarkSturnella neglectaSummer visitorCommon16–26 cmRecorded all year · 0.70% in Aug
OspreyPandion haliaetusSummer visitorCommon54–58 cmRegularly Mar–Oct · 0.66% in Aug
Common GrackleQuiscalus quisculaSummer visitorCommon28–34 cmRegularly Mar–Oct · 0.65% in Aug
Yellow-rumped WarblerSetophaga coronataSummer visitorCommon12–15 cmRecorded all year · 0.62% in Aug
Cedar WaxwingBombycilla cedrorumResidentCommon15–18 cmRecorded all year · 0.56% in Aug
Hairy WoodpeckerLeuconotopicus villosusResidentCommon18–26 cmRecorded all year · 0.56% in Aug
Gray CatbirdDumetella carolinensisSummer visitorCommon20–24 cmRegularly May–Oct · 0.53% in Aug
Vesper SparrowPooecetes gramineusSummer visitorCommon13–17 cmRegularly Apr–Oct · 0.45% in Aug
Mountain BluebirdSialia currucoidesSummer visitorCommon15–18 cmRecorded all year · 0.44% in Aug
Red CrossbillLoxia curvirostraResidentUncommon15–17 cmRecorded all year · 0.39% in Aug
Baird's SandpiperCalidris bairdiiPassage migrantUncommon14–17 cmRegularly Apr–Oct · 0.37% in Aug
Bald EagleHaliaeetus leucocephalusWinter visitorCommon70–102 cmRecorded all year · 0.37% in Aug
Horned LarkEremophila alpestrisResidentCommon16–20 cmRecorded all year · 0.34% in Aug
Pied-billed GrebePodilymbus podicepsWinter visitorCommon31–38 cmRecorded all year · 0.33% in Aug
White-crowned SparrowZonotrichia leucophrysWinter visitorCommon15–16 cmRecorded all year · 0.31% in Aug
Least SandpiperCalidris minutillaPassage migrantUncommon13–15 cmRegularly Apr–Nov · 0.28% in Aug
Solitary SandpiperTringa solitariaPassage migrantUncommon19–23 cmRegularly Apr–Sep · 0.26% in Aug
Common YellowthroatGeothlypis trichasSummer visitorCommon11–13 cmRegularly May–Oct · 0.26% in Aug
Lesser YellowlegsTringa flavipesPassage migrantUncommon23–27 cmRegularly Apr–Oct · 0.26% in Aug
Ruby-crowned KingletCorthylio calendulaSummer visitorCommon9–11 cmRecorded all year · 0.25% in Aug
Great Horned OwlBubo virginianusResidentUncommon46–63 cmRecorded all year · 0.24% in Aug
Eurasian TealAnas creccaWinter visitorCommon34–38 cmRegularly Aug–Jun · 0.24% in Aug
American AvocetRecurvirostra americanaSummer visitorCommon43–51 cmRegularly Mar–Oct · 0.23% in Aug
Lincoln's SparrowMelospiza lincolniiSummer visitorCommon13–15 cmRegularly Mar–Dec · 0.22% in Aug
Wilson's PhalaropePhalaropus tricolorSummer visitorUncommon22–24 cmRegularly Apr–Sep · 0.22% in Aug
Evening GrosbeakHesperiphona vespertinaResidentUncommon16–22 cmRecorded all year · 0.21% in Aug
Wild TurkeyMeleagris gallopavoResidentUncommon100–125 cmRecorded all year · 0.21% in Aug
Northern ShovelerSpatula clypeataWinter visitorCommon44–51 cmRegularly Aug–Jun · 0.20% in Aug
Wood DuckAix sponsaResidentUncommon47–54 cmRecorded all year · 0.20% in Aug
Greater YellowlegsTringa melanoleucaPassage migrantCommon29–40 cmRegularly Mar–Nov · 0.20% in Aug
GadwallMareca streperaWinter visitorCommon46–56 cmRecorded all year · 0.20% in Aug
Black-crowned Night-heronNycticorax nycticoraxSummer visitorUncommon58–65 cmRecorded all year · 0.19% in Aug
Orange-crowned WarblerLeiothlypis celataSummer visitorCommon11–14 cmRegularly Apr–Oct · 0.18% in Aug
Red-naped SapsuckerSphyrapicus nuchalisSummer visitorUncommon19–21 cmRegularly Apr–Oct · 0.18% in Aug
Common MerganserMergus merganserWinter visitorCommon58–68 cmRecorded all year · 0.18% in Aug
Franklin's GullLeucophaeus pipixcanPassage migrantUncommon32–36 cmRegularly Mar–Nov · 0.16% in Aug
Great White EgretArdea albaSummer visitorUncommon80–104 cmRegularly Apr–Oct · 0.16% in Aug
Ruddy DuckOxyura jamaicensisWinter visitorCommon35–43 cmRecorded all year · 0.16% in Aug
Cinnamon TealSpatula cyanopteraSummer visitorCommon36–43 cmRegularly Feb–Sep · 0.15% in Aug
Golden EagleAquila chrysaetosResidentUncommon66–102 cmRecorded all year · 0.15% in Aug
Sand MartinRiparia ripariaSummer visitorUncommon12–14 cmRegularly Apr–Sep · 0.14% in Aug
Lewis's WoodpeckerMelanerpes lewisResidentUncommon26–28 cmRecorded all year · 0.12% in Aug
Semipalmated SandpiperCalidris pusillaPassage migrantUncommon15–18 cmRegularly Apr–Oct · 0.12% in Aug
Western SandpiperCalidris mauriPassage migrantUncommon14–17 cmRegularly Apr–Oct · 0.11% in Aug
Black-necked GrebePodiceps nigricollisSummer visitorCommon28–34 cmRecorded all year · 0.11% in Aug
Williamson's SapsuckerSphyrapicus thyroideusSummer visitorUncommon21–25 cmRegularly Apr–Jan · 0.11% in Aug
Peregrine FalconFalco peregrinusSummer visitorUncommon34–58 cmRecorded all year · 0.10% in Aug
Forster's TernSterna forsteriSummer visitorUncommon33–36 cmRegularly Apr–Oct · 0.10% in Aug
Stilt SandpiperCalidris himantopusPassage migrantUncommon18–23 cmRegularly May–Oct · 0.09% in Aug
Long-billed DowitcherLimnodromus scolopaceusPassage migrantUncommon27–30 cmRegularly Mar–Nov · 0.09% in Aug
Northern MockingbirdMimus polyglottosSummer visitorUncommon21–26 cmRegularly Apr–Sep · 0.09% in Aug
Black TernChlidonias nigerSummer visitorUncommon22–26 cmRegularly May–Sep · 0.09% in Aug
Red-headed WoodpeckerMelanerpes erythrocephalusSummer visitorUncommon19–23 cmRegularly May–Oct · 0.09% in Aug
American Three-toed WoodpeckerPicoides dorsalisSummer visitorUncommon21–24 cmRecorded all year · 0.08% in Aug
Hermit ThrushCatharus guttatusSummer visitorUncommon14–18 cmRegularly Apr–Dec · 0.08% in Aug
Burrowing OwlAthene cuniculariaSummer visitorUncommon19–25 cmRegularly Mar–Oct · 0.08% in Aug
Willow FlycatcherEmpidonax trailliiSummer visitorUncommon13–17 cmRegularly May–Sep · 0.08% in Aug
Virginia RailRallus limicolaResidentUncommon20–27 cmRecorded all year · 0.07% in Aug
Clay-colored SparrowSpizella pallidaPassage migrantUncommon13–15 cmRegularly May–Oct · 0.07% in Aug
Marsh WrenCistothorus palustrisResidentUncommon10–14 cmRecorded all year · 0.07% in Aug
Northern PintailAnas acutaWinter visitorUncommon59–76 cmRegularly Aug–Jun · 0.06% in Aug
Pectoral SandpiperCalidris melanotosPassage migrantUncommon19–23 cmRegularly Aug–Nov · 0.06% in Aug
Sharp-shinned HawkAccipiter striatusWinter visitorUncommon24–34 cmRecorded all year · 0.06% in Aug
Semipalmated PloverCharadrius semipalmatusPassage migrantUncommon17–19 cmRegularly Apr–Oct · 0.06% in Aug
Sandhill CraneAntigone canadensisWinter visitorUncommon80–122 cmRecorded all year · 0.06% in Aug
Marbled GodwitLimosa fedoaSummer visitorUncommon40–50 cmRegularly Apr–Sep · 0.05% in Aug
White-winged DoveZenaida asiaticaResidentUncommon27–30 cmRecorded all year · 0.05% in Aug
WilletTringa semipalmataSummer visitorUncommon33–41 cmRegularly Apr–Sep · 0.05% in Aug
Upland SandpiperBartramia longicaudaSummer visitorRare28–32 cmRegularly May–Sep · 0.04% in Aug
Northern WaterthrushParkesia noveboracensisPassage migrantUncommon12–15 cmRegularly May–Sep · 0.04% in Aug
Red-necked PhalaropePhalaropus lobatusPassage migrantUncommon18–19 cmRegularly May–Oct · 0.03% in Aug
SanderlingCalidris albaPassage migrantUncommon18–20 cmRegularly May–Oct · 0.03% in Aug
American RedstartSetophaga ruticillaSummer visitorUncommon11–14 cmRegularly May–Sep · 0.03% in Aug
DickcisselSpiza americanaSummer visitorUncommon14–16 cmRegularly May–Sep · 0.03% in Aug
Fox SparrowPasserella iliacaSummer visitorUncommon15–19 cmRecorded all year · 0.03% in Aug
Grey PloverPluvialis squatarolaPassage migrantUncommon27–30 cmRegularly May–Nov · 0.03% in Aug
Least FlycatcherEmpidonax minimusSummer visitorUncommon12–14 cmRegularly May–Sep · 0.02% in Aug
Purple MartinProgne subisSummer visitorRare18–20 cmRegularly May–Sep · 0.02% in Aug
Long-tailed JaegerStercorarius longicaudusPassage migrantRare48–58 cmRegularly Aug–Sep · 0.02% in Aug
Nashville WarblerLeiothlypis ruficapillaPassage migrantRare11–13 cmRegularly Apr–Nov · 0.02% in Aug
Cattle EgretArdea ibisSummer visitorRare46–56 cmRegularly Apr–Nov · 0.02% in Aug
Common PheasantPhasianus colchicusResidentUncommon50–90 cmRecorded all year · 0.02% in Aug
Ladder-backed WoodpeckerDryobates scalarisSummer visitorUncommon16–19 cmRecorded all year · 0.01% in Aug
Northern Pygmy-owlGlaucidium gnomaResidentRare15–17 cmRecorded all year · 0.01% in Aug
Great Crested FlycatcherMyiarchus crinitusSummer visitorRare17–22 cmRegularly May–Sep · 0.01% in Aug
Eastern Screech-owlMegascops asioWinter visitorUncommon16–25 cmRecorded all year · 0.01% in Aug
Baltimore OrioleIcterus galbulaSummer visitorRare17–19 cmRegularly May–Sep · 0.01% in Aug
American BitternBotaurus lentiginosusSummer visitorRare58–85 cmRegularly Apr–Oct · 0.01% in Aug
Greater RoadrunnerGeococcyx californianusResidentRare52–54 cmRecorded all year · 0.01% in Aug
Buff-breasted SandpiperCalidris subruficollisPassage migrantRare18–20 cmRegularly Aug–Sep · 0.01% in Aug
Short-billed DowitcherLimnodromus griseusPassage migrantRare23–32 cmRegularly Apr–Sep · 0.01% in Aug
Sabine's GullXema sabiniPassage migrantUncommon27–33 cmRegularly Aug–Oct · 0.01% in Aug
OvenbirdSeiurus aurocapillaSummer visitorUncommon12–15 cmRegularly May–Sep · 0.01% in Aug
Northern CardinalCardinalis cardinalisResidentRare21–23 cmRecorded all year · 0.01% in Aug
Piping PloverCharadrius melodusSummer visitorRare17–18 cmRegularly Apr–Sep · 0.01% in Aug
Common TernSterna hirundoPassage migrantRare31–35 cmRegularly Jun–Oct · 0.01% in Aug
ChukarAlectoris chukarResidentRare32–38 cmRecorded all year · 0.01% in Aug
Eastern BluebirdSialia sialisWinter visitorRare16–21 cmRecorded all year · 0.00% in Aug
Northern Saw-whet OwlAegolius acadicusResidentRare17–21 cmRecorded all year · 0.00% in Aug
Greylag GooseAnser anserWinter visitorRare75–90 cmRecorded all year · 0.00% in Aug
Red KnotCalidris canutusResidentRare23–26 cmRegularly Aug–Sep · 0.00% in Aug
Red-bellied WoodpeckerMelanerpes carolinusResidentRare23–26 cmRecorded all year · 0.00% in Aug
Red-necked GrebePodiceps grisegenaWinter visitorRare40–50 cmRegularly Jul–Mar · 0.00% in Aug
Broad-winged HawkButeo platypterusPassage migrantRare34–44 cmRegularly Apr–Oct · 0.00% in Aug
Flammulated OwlPsiloscops flammeolusSummer visitorRare15–17 cmRegularly May–Sep · 0.00% in Aug
Western Screech-owlMegascops kennicottiiWinter visitorRare19–25 cmRecorded all year · 0.00% in Aug
Chestnut-sided WarblerSetophaga pensylvanicaPassage migrantRare10–14 cmRegularly May–Oct · 0.00% in Aug
Boreal OwlAegolius funereusSummer visitorRare21–28 cmRegularly Jan–Oct · 0.00% in Aug
Mute SwanCygnus olorWinter visitorRare140–160 cmRecorded all year · 0.00% in Aug
Painted BuntingPasserina cirisPassage migrantRare12–14 cmRegularly May–Aug · 0.00% in Aug
Acorn WoodpeckerMelanerpes formicivorusSummer visitorRare20–24 cmRegularly May–Feb · 0.00% in Aug
VeeryCatharus fuscescensSummer visitorRare16–19 cmRegularly May–Sep · 0.00% in Aug
Ruddy TurnstoneArenaria interpresResidentRare21–24 cmRegularly May–Sep · 0.00% in Aug
Swan GooseAnser cygnoidesWinter visitorRare81–94 cmRecorded all year · 0.00% in Aug
Ruby-throated HummingbirdArchilochus colubrisPassage migrantRare7–9 cmRegularly May–Oct · 0.00% in Aug
Muscovy DuckCairina moschataSummer visitorRare66–84 cmRegularly Jan–Nov · 0.00% in Aug
Alder FlycatcherEmpidonax alnorumPassage migrantRare13–17 cmRegularly May–Sep · 0.00% in Aug
Data: EOD – eBird Observation Dataset (Cornell Lab of Ornithology), accessed via GBIF.org, CC BY 4.0. Records from 2019–2024, aggregated and filtered by Birdfact. How these lists are made