Uncommon Birds in Colorado
Our list for Colorado has 81 uncommon birds recorded regularly there: 11 residents, 25 summer visitors, 24 winter visitors and 21 passage migrants
Most likely in October
GBIF · Oct
Share of all bird records in Colorado in October, 2019–2024. Each month links to that month’s page.
All 81, most common first
Western SandpiperCalidris mauriPassage migrantUncommon14–17 cmRegularly Apr–Oct
Marbled GodwitLimosa fedoaSummer visitorUncommon40–50 cmRegularly Apr–Sep
Virginia RailRallus limicolaResidentUncommon20–27 cmRecorded all year
Fox SparrowPasserella iliacaSummer visitorUncommon15–19 cmRecorded all year
Pacific LoonGavia pacificaPassage migrantUncommon58–74 cmRegularly Oct–Jan
Northern WaterthrushParkesia noveboracensisPassage migrantUncommon12–15 cmRegularly May–Sep
Bohemian WaxwingBombycilla garrulusWinter visitorUncommon19–23 cmRegularly Nov–Mar
White-winged DoveZenaida asiaticaResidentUncommon27–30 cmRecorded all year
Peregrine FalconFalco peregrinusSummer visitorUncommon34–58 cmRecorded all year
Greater ScaupAythya marilaWinter visitorUncommon39–56 cmRegularly Oct–Apr
Long-tailed DuckClangula hyemalisWinter visitorUncommon37–60 cmRegularly Nov–Apr
SanderlingCalidris albaPassage migrantUncommon18–20 cmRegularly May–Oct
Forster's TernSterna forsteriSummer visitorUncommon33–36 cmRegularly Apr–Oct
Burrowing OwlAthene cuniculariaSummer visitorUncommon19–25 cmRegularly Mar–Oct
Red-necked PhalaropePhalaropus lobatusPassage migrantUncommon18–19 cmRegularly May–Oct
Red-headed WoodpeckerMelanerpes erythrocephalusSummer visitorUncommon19–23 cmRegularly May–Oct
Iceland GullLarus glaucoidesWinter visitorUncommon52–60 cmRegularly Oct–Apr
Common PheasantPhasianus colchicusResidentUncommon50–90 cmRecorded all year
Black TernChlidonias nigerSummer visitorUncommon22–26 cmRegularly May–Sep
American RedstartSetophaga ruticillaSummer visitorUncommon11–14 cmRegularly May–Sep
Trumpeter SwanCygnus buccinatorWinter visitorUncommon139–157 cmRegularly Nov–Mar
Tundra SwanCygnus columbianusWinter visitorUncommon120–150 cmRegularly Oct–Mar
Ladder-backed WoodpeckerDryobates scalarisSummer visitorUncommon16–19 cmRecorded all year
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