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Birds Seen in Colorado in September

60 species · iNaturalist data

60 birds were recorded seen in Colorado in September in our iNaturalist sample; 7 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.

Top birds in September

All birds seen in Colorado in September

#SpeciesScientific nameFamilyObs.Peak in state
1Black-billed MagpiePica hudsoniaCrows, Jays, and Magpies1,068Jun (past peak)
2Red-tailed HawkButeo jamaicensisHawks, Eagles, and Kites932Apr (past peak)
3Steller's JayCyanocitta stelleriCrows, Jays, and Magpies779Sep (peak)
4MallardAnas platyrhynchosDucks, Geese, and Swans674Apr (past peak)
5Northern FlickerColaptes auratusWoodpeckers630Apr (past peak)
6Wild TurkeyMeleagris gallopavoPheasants, Grouse, and Allies554Apr (past peak)
7Canada JayPerisoreus canadensisCrows, Jays, and Magpies530Sep (peak)
8Wilson's WarblerCardellina pusillaNew World Warblers473Sep (peak)
9Great Blue HeronArdea herodiasHerons, Egrets, and Bitterns436May (past peak)
10Cooper's HawkAstur cooperiiHawks, Eagles, and Kites417Aug (past peak)
11Canada GooseBranta canadensisDucks, Geese, and Swans360Apr (past peak)
12Say's PhoebeSayornis sayaTyrant Flycatchers354Apr (past peak)
13American RobinTurdus migratoriusThrushes336Apr (past peak)
14Vesper SparrowPooecetes gramineusNew World Sparrows331Sep (peak)
15Woodhouse's Scrub-JayAphelocoma woodhouseiiCrows, Jays, and Magpies323Aug (past peak)
16Dusky GrouseDendragapus obscurusPheasants, Grouse, and Allies317Aug (past peak)
17Great Horned OwlBubo virginianusTypical Owls312May (past peak)
18Swainson's HawkButeo swainsoniHawks, Eagles, and Kites310Aug (past peak)
19House FinchHaemorhous mexicanusFinches, Euphonias, and Allies309May (past peak)
20Chipping SparrowSpizella passerinaNew World Sparrows308May (past peak)
21White-crowned SparrowZonotrichia leucophrysNew World Sparrows303Jul (past peak)
22Broad-tailed HummingbirdSelasphorus platycercusHummingbirds295Jul (past peak)
23Mountain ChickadeePoecile gambeliTits, Chickadees, and Titmice292Aug (past peak)
24Double-crested CormorantNannopterum auritumCormorants and Shags287May (past peak)
25Turkey VultureCathartes auraNew World Vultures279Apr (past peak)
26Dark-eyed JuncoJunco hyemalisNew World Sparrows268Jul (past peak)
27Snowy EgretEgretta thulaHerons, Egrets, and Bitterns266May (past peak)
28Black-capped ChickadeePoecile atricapillusTits, Chickadees, and Titmice258Apr (past peak)
29Yellow-rumped WarblerSetophaga coronataNew World Warblers255May (past peak)
30Blue JayCyanocitta cristataCrows, Jays, and Magpies254May (past peak)
31American KestrelFalco sparveriusFalcons and Caracaras252Jan (past peak)
32Bald EagleHaliaeetus leucocephalusHawks, Eagles, and Kites238Jan (past peak)
33Clark's NutcrackerNucifraga columbianaCrows, Jays, and Magpies236Aug (past peak)
34Downy WoodpeckerDryobates pubescensWoodpeckers234Apr (past peak)
35OspreyPandion haliaetusOspreys233Apr (past peak)
36Mountain BluebirdSialia currucoidesThrushes231Jun (past peak)
37American White PelicanPelecanus erythrorhynchosPelicans223Apr (past peak)
38Spotted TowheePipilo maculatusNew World Sparrows220May (past peak)
39Rock WrenSalpinctes obsoletusWrens217Sep (peak)
40White-breasted NuthatchSitta carolinensisNuthatches216Jul (past peak)
41Lesser GoldfinchSpinus psaltriaFinches, Euphonias, and Allies198Jun (past peak)
42Hairy WoodpeckerLeuconotopicus villosusWoodpeckers196Aug (past peak)
43American CrowCorvus brachyrhynchosCrows, Jays, and Magpies192Apr (past peak)
44Ring-billed GullLarus delawarensisGulls, Terns, and Skimmers189Nov (rising)
45Common RavenCorvus coraxCrows, Jays, and Magpies189Jul (past peak)
46American GoldfinchSpinus tristisFinches, Euphonias, and Allies186May (past peak)
47Pygmy NuthatchSitta pygmaeaNuthatches180Jul (past peak)
48Red-breasted NuthatchSitta canadensisNuthatches172Sep (peak)
49Sage ThrasherOreoscoptes montanusMockingbirds and Thrashers168Sep (peak)
50European StarlingSturnus vulgarisStarlings164Apr (past peak)