Birds to See in Colorado in April
137 bird species on our list for Colorado are recorded regularly in April
Of these, the most often recorded are American Robin, Red-winged Blackbird, Mallard, Canada Goose and House Finch. New this month: Barn Swallow, Western Kingbird, Chipping Sparrow and Vesper Sparrow and 31 more.
On the move in April
GBIF · AprArriving
At their peak
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 137 birds in April
137 birds
American RobinTurdus migratoriusResidentCommon20–28 cmRecorded all year · 3.65% in Apr
Red-winged BlackbirdAgelaius phoeniceusResidentCommon17–23 cmRecorded all year · 3.28% in Apr
MallardAnas platyrhynchosResidentCommon50–65 cmRecorded all year · 3.11% in Apr
Canada GooseBranta canadensisResidentCommon76–110 cmRecorded all year · 3.00% in Apr
House FinchHaemorhous mexicanusResidentCommon13–15 cmRecorded all year · 2.61% in Apr
Northern FlickerColaptes auratusResidentCommon28–31 cmRecorded all year · 2.46% in Apr
Common StarlingSturnus vulgarisResidentCommon21–23 cmRecorded all year · 2.20% in Apr
Western MeadowlarkSturnella neglectaSummer visitorCommon16–26 cmRecorded all year · 2.13% in Apr
Red-tailed HawkButeo jamaicensisResidentCommon45–65 cmRecorded all year · 1.98% in Apr
American CrowCorvus brachyrhynchosResidentCommon41–53 cmRecorded all year · 1.94% in Apr
Common GrackleQuiscalus quisculaSummer visitorCommon28–34 cmRegularly Mar–Oct · 1.88% in Apr
Mourning DoveZenaida macrouraSummer visitorCommon23–34 cmRecorded all year · 1.85% in Apr
GadwallMareca streperaWinter visitorCommon46–56 cmRecorded all year · 1.78% in Apr
Eurasian Collared DoveStreptopelia decaoctoResidentCommon30–32 cmRecorded all year · 1.76% in Apr
Say's PhoebeSayornis sayaSummer visitorCommon17–20 cmRecorded all year · 1.53% in Apr
Song SparrowMelospiza melodiaResidentCommon12–17 cmRecorded all year · 1.52% in Apr
Great Blue HeronArdea herodiasResidentCommon91–137 cmRecorded all year · 1.43% in Apr
Northern ShovelerSpatula clypeataWinter visitorCommon44–51 cmRegularly Aug–Jun · 1.41% in Apr
Common RavenCorvus coraxResidentCommon54–67 cmRecorded all year · 1.34% in Apr
Blue JayCyanocitta cristataResidentCommon25–30 cmRecorded all year · 1.24% in Apr
Eurasian TealAnas creccaWinter visitorCommon34–38 cmRegularly Aug–Jun · 1.17% in Apr
Turkey VultureCathartes auraSummer visitorCommon62–81 cmRegularly Mar–Oct · 1.13% in Apr
House SparrowPasser domesticusResidentCommon14–17 cmRecorded all year · 1.06% in Apr
White-crowned SparrowZonotrichia leucophrysWinter visitorCommon15–16 cmRecorded all year · 1.00% in Apr
Downy WoodpeckerDryobates pubescensResidentCommon14–18 cmRecorded all year · 0.93% in Apr
Yellow-rumped WarblerSetophaga coronataSummer visitorCommon12–15 cmRecorded all year · 0.90% in Apr
Rock DoveColumba liviaResidentCommon29–37 cmRecorded all year · 0.84% in Apr
Cinnamon TealSpatula cyanopteraSummer visitorCommon36–43 cmRegularly Feb–Sep · 0.82% in Apr
OspreyPandion haliaetusSummer visitorCommon54–58 cmRegularly Mar–Oct · 0.80% in Apr
Ring-billed GullLarus delawarensisWinter visitorCommon43–54 cmRegularly Jul–May · 0.78% in Apr
White-breasted NuthatchSitta carolinensisResidentCommon13–14 cmRecorded all year · 0.77% in Apr
Bald EagleHaliaeetus leucocephalusWinter visitorCommon70–102 cmRecorded all year · 0.76% in Apr
Barn SwallowHirundo rusticaSummer visitorCommon17–19 cmRegularly Apr–Oct · 0.72% in Apr
Horned LarkEremophila alpestrisResidentCommon16–20 cmRecorded all year · 0.68% in Apr
American AvocetRecurvirostra americanaSummer visitorCommon43–51 cmRegularly Mar–Oct · 0.64% in Apr
Ruddy DuckOxyura jamaicensisWinter visitorCommon35–43 cmRecorded all year · 0.64% in Apr
Common MerganserMergus merganserWinter visitorCommon58–68 cmRecorded all year · 0.63% in Apr
Mountain BluebirdSialia currucoidesSummer visitorCommon15–18 cmRecorded all year · 0.53% in Apr
Pine SiskinSpinus pinusResidentCommon11–14 cmRecorded all year · 0.52% in Apr
Greater YellowlegsTringa melanoleucaPassage migrantCommon29–40 cmRegularly Mar–Nov · 0.52% in Apr
Pied-billed GrebePodilymbus podicepsWinter visitorCommon31–38 cmRecorded all year · 0.43% in Apr
Franklin's GullLeucophaeus pipixcanPassage migrantUncommon32–36 cmRegularly Mar–Nov · 0.42% in Apr
GoldeneyeBucephala clangulaWinter visitorCommon40–51 cmRegularly Nov–Apr · 0.41% in Apr
Great Horned OwlBubo virginianusResidentUncommon46–63 cmRecorded all year · 0.41% in Apr
Vesper SparrowPooecetes gramineusSummer visitorCommon13–17 cmRegularly Apr–Oct · 0.38% in Apr
Black-necked GrebePodiceps nigricollisSummer visitorCommon28–34 cmRecorded all year · 0.38% in Apr
Lesser YellowlegsTringa flavipesPassage migrantUncommon23–27 cmRegularly Apr–Oct · 0.37% in Apr
Hooded MerganserLophodytes cucullatusWinter visitorCommon40–49 cmRegularly Oct–Apr · 0.36% in Apr
Chipping SparrowSpizella passerinaSummer visitorCommon12–15 cmRegularly Apr–Oct · 0.34% in Apr
Horned GrebePodiceps auritusWinter visitorUncommon31–38 cmRegularly Oct–May · 0.32% in Apr
Wood DuckAix sponsaResidentUncommon47–54 cmRecorded all year · 0.32% in Apr
Hairy WoodpeckerLeuconotopicus villosusResidentCommon18–26 cmRecorded all year · 0.30% in Apr
Ruby-crowned KingletCorthylio calendulaSummer visitorCommon9–11 cmRecorded all year · 0.27% in Apr
Wild TurkeyMeleagris gallopavoResidentUncommon100–125 cmRecorded all year · 0.26% in Apr
Golden EagleAquila chrysaetosResidentUncommon66–102 cmRecorded all year · 0.23% in Apr
Least SandpiperCalidris minutillaPassage migrantUncommon13–15 cmRegularly Apr–Nov · 0.19% in Apr
WilletTringa semipalmataSummer visitorUncommon33–41 cmRegularly Apr–Sep · 0.17% in Apr
Long-billed DowitcherLimnodromus scolopaceusPassage migrantUncommon27–30 cmRegularly Mar–Nov · 0.16% in Apr
Northern PintailAnas acutaWinter visitorUncommon59–76 cmRegularly Aug–Jun · 0.16% in Apr
Lincoln's SparrowMelospiza lincolniiSummer visitorCommon13–15 cmRegularly Mar–Dec · 0.15% in Apr
Sandhill CraneAntigone canadensisWinter visitorUncommon80–122 cmRecorded all year · 0.14% in Apr
Western KingbirdTyrannus verticalisSummer visitorCommon20–24 cmRegularly Apr–Sep · 0.14% in Apr
Evening GrosbeakHesperiphona vespertinaResidentUncommon16–22 cmRecorded all year · 0.14% in Apr
Orange-crowned WarblerLeiothlypis celataSummer visitorCommon11–14 cmRegularly Apr–Oct · 0.13% in Apr
Marsh WrenCistothorus palustrisResidentUncommon10–14 cmRecorded all year · 0.13% in Apr
Black-crowned Night-heronNycticorax nycticoraxSummer visitorUncommon58–65 cmRecorded all year · 0.13% in Apr
Wilson's PhalaropePhalaropus tricolorSummer visitorUncommon22–24 cmRegularly Apr–Sep · 0.12% in Apr
Marbled GodwitLimosa fedoaSummer visitorUncommon40–50 cmRegularly Apr–Sep · 0.11% in Apr
Red CrossbillLoxia curvirostraResidentUncommon15–17 cmRecorded all year · 0.11% in Apr
Sharp-shinned HawkAccipiter striatusWinter visitorUncommon24–34 cmRecorded all year · 0.11% in Apr
Virginia RailRallus limicolaResidentUncommon20–27 cmRecorded all year · 0.11% in Apr
Bonaparte's GullChroicocephalus philadelphiaPassage migrantUncommon28–38 cmRegularly Oct–May · 0.11% in Apr
Burrowing OwlAthene cuniculariaSummer visitorUncommon19–25 cmRegularly Mar–Oct · 0.10% in Apr
Red-breasted MerganserMergus serratorWinter visitorUncommon52–58 cmRegularly Oct–Apr · 0.09% in Apr
Peregrine FalconFalco peregrinusSummer visitorUncommon34–58 cmRecorded all year · 0.09% in Apr
Sand MartinRiparia ripariaSummer visitorUncommon12–14 cmRegularly Apr–Sep · 0.09% in Apr
Common LoonGavia immerWinter visitorUncommon66–91 cmRegularly Oct–Apr · 0.09% in Apr
Solitary SandpiperTringa solitariaPassage migrantUncommon19–23 cmRegularly Apr–Sep · 0.09% in Apr
Baird's SandpiperCalidris bairdiiPassage migrantUncommon14–17 cmRegularly Apr–Oct · 0.09% in Apr
Common PheasantPhasianus colchicusResidentUncommon50–90 cmRecorded all year · 0.09% in Apr
Cedar WaxwingBombycilla cedrorumResidentCommon15–18 cmRecorded all year · 0.09% in Apr
Red-naped SapsuckerSphyrapicus nuchalisSummer visitorUncommon19–21 cmRegularly Apr–Oct · 0.08% in Apr
Lark SparrowChondestes grammacusSummer visitorCommon15–17 cmRegularly Apr–Sep · 0.08% in Apr
Great White EgretArdea albaSummer visitorUncommon80–104 cmRegularly Apr–Oct · 0.07% in Apr
White-winged DoveZenaida asiaticaResidentUncommon27–30 cmRecorded all year · 0.06% in Apr
American Herring GullLarus smithsonianusWinter visitorUncommon53–65 cmRegularly Sep–Apr · 0.06% in Apr
Snow GooseAnser caerulescensWinter visitorUncommon69–84 cmRegularly Oct–Apr · 0.06% in Apr
Western SandpiperCalidris mauriPassage migrantUncommon14–17 cmRegularly Apr–Oct · 0.06% in Apr
Semipalmated PloverCharadrius semipalmatusPassage migrantUncommon17–19 cmRegularly Apr–Oct · 0.05% in Apr
Northern MockingbirdMimus polyglottosSummer visitorUncommon21–26 cmRegularly Apr–Sep · 0.05% in Apr
Hermit ThrushCatharus guttatusSummer visitorUncommon14–18 cmRegularly Apr–Dec · 0.05% in Apr
MerlinFalco columbariusWinter visitorUncommon24–33 cmRegularly Sep–Apr · 0.05% in Apr
Semipalmated SandpiperCalidris pusillaPassage migrantUncommon15–18 cmRegularly Apr–Oct · 0.05% in Apr
Lewis's WoodpeckerMelanerpes lewisResidentUncommon26–28 cmRecorded all year · 0.04% in Apr
Fox SparrowPasserella iliacaSummer visitorUncommon15–19 cmRecorded all year · 0.04% in Apr
Greater ScaupAythya marilaWinter visitorUncommon39–56 cmRegularly Oct–Apr · 0.04% in Apr
Ladder-backed WoodpeckerDryobates scalarisSummer visitorUncommon16–19 cmRecorded all year · 0.04% in Apr
Rough-legged HawkButeo lagopusWinter visitorUncommon46–59 cmRegularly Nov–Apr · 0.04% in Apr
Broad-winged HawkButeo platypterusPassage migrantRare34–44 cmRegularly Apr–Oct · 0.03% in Apr
Williamson's SapsuckerSphyrapicus thyroideusSummer visitorUncommon21–25 cmRegularly Apr–Jan · 0.03% in Apr
Forster's TernSterna forsteriSummer visitorUncommon33–36 cmRegularly Apr–Oct · 0.03% in Apr
Cattle EgretArdea ibisSummer visitorRare46–56 cmRegularly Apr–Nov · 0.02% in Apr
Northern CardinalCardinalis cardinalisResidentRare21–23 cmRecorded all year · 0.02% in Apr
Lesser Black-backed GullLarus fuscusWinter visitorUncommon52–64 cmRegularly Sep–Apr · 0.02% in Apr
WhimbrelNumenius phaeopusPassage migrantRare40–46 cmRegularly Apr–May · 0.02% in Apr
Greater White-fronted GooseAnser albifronsWinter visitorUncommon64–81 cmRegularly Oct–Apr · 0.02% in Apr
Eastern BluebirdSialia sialisWinter visitorRare16–21 cmRecorded all year · 0.02% in Apr
American Three-toed WoodpeckerPicoides dorsalisSummer visitorUncommon21–24 cmRecorded all year · 0.02% in Apr
Glossy IbisPlegadis falcinellusPassage migrantRare48–66 cmRegularly Apr–May · 0.01% in Apr
ChukarAlectoris chukarResidentRare32–38 cmRecorded all year · 0.01% in Apr
Long-tailed DuckClangula hyemalisWinter visitorUncommon37–60 cmRegularly Nov–Apr · 0.01% in Apr
Eastern Screech-owlMegascops asioWinter visitorUncommon16–25 cmRecorded all year · 0.01% in Apr
Northern Pygmy-owlGlaucidium gnomaResidentRare15–17 cmRecorded all year · 0.01% in Apr
Boreal OwlAegolius funereusSummer visitorRare21–28 cmRegularly Jan–Oct · 0.01% in Apr
Red-bellied WoodpeckerMelanerpes carolinusResidentRare23–26 cmRecorded all year · 0.01% in Apr
American BitternBotaurus lentiginosusSummer visitorRare58–85 cmRegularly Apr–Oct · 0.01% in Apr
Northern Saw-whet OwlAegolius acadicusResidentRare17–21 cmRecorded all year · 0.01% in Apr
Ross's GooseAnser rossiiWinter visitorUncommon57–64 cmRegularly Oct–Apr · 0.01% in Apr
Short-eared OwlAsio flammeusWinter visitorRare34–43 cmRegularly Oct–Jun · 0.01% in Apr
Greylag GooseAnser anserWinter visitorRare75–90 cmRecorded all year · 0.01% in Apr
DunlinCalidris alpinaWinter visitorRare16–22 cmRegularly Oct–Apr · 0.01% in Apr
Western Screech-owlMegascops kennicottiiWinter visitorRare19–25 cmRecorded all year · 0.01% in Apr
Iceland GullLarus glaucoidesWinter visitorUncommon52–60 cmRegularly Oct–Apr · 0.00% in Apr
Nashville WarblerLeiothlypis ruficapillaPassage migrantRare11–13 cmRegularly Apr–Nov · 0.00% in Apr
Swamp SparrowMelospiza georgianaWinter visitorUncommon12–15 cmRegularly Oct–Apr · 0.00% in Apr
Lapland LongspurCalcarius lapponicusWinter visitorUncommon15–16 cmRegularly Oct–Apr · 0.00% in Apr
Greater RoadrunnerGeococcyx californianusResidentRare52–54 cmRecorded all year · 0.00% in Apr
Mute SwanCygnus olorWinter visitorRare140–160 cmRecorded all year · 0.00% in Apr
Palm WarblerSetophaga palmarumPassage migrantRare12–14 cmRegularly Apr–Dec · 0.00% in Apr
Eurasian WigeonMareca penelopePassage migrantRare42–51 cmRegularly Dec–Apr · 0.00% in Apr
Pacific WrenTroglodytes pacificusWinter visitorRare8–12 cmRegularly Jul–Apr · 0.00% in Apr
Swan GooseAnser cygnoidesWinter visitorRare81–94 cmRecorded all year · 0.00% in Apr
Piping PloverCharadrius melodusSummer visitorRare17–18 cmRegularly Apr–Sep · 0.00% in Apr
Muscovy DuckCairina moschataSummer visitorRare66–84 cmRegularly Jan–Nov · 0.00% in Apr
Short-billed DowitcherLimnodromus griseusPassage migrantRare23–32 cmRegularly Apr–Sep · 0.00% in Apr
Blue-headed VireoVireo solitariusPassage migrantRare12–15 cmRegularly Apr–Oct · 0.00% in Apr
Helmeted GuineafowlNumida meleagrisResidentRare53–63 cmRegularly Nov–May · 0.00% in Apr
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