Uncommon Birds in Wisconsin
Our list for Wisconsin has 79 uncommon birds recorded regularly there: 7 residents, 28 summer visitors, 23 winter visitors and 21 passage migrants
Most likely in October
GBIF · Oct
Share of all bird records in Wisconsin in October, 2019–2024. Each month links to that month’s page.
All 79, most common first
Lesser YellowlegsTringa flavipesPassage migrantUncommon23–27 cmRegularly Apr–Oct
OspreyPandion haliaetusSummer visitorUncommon54–58 cmRegularly Apr–Oct
Greater ScaupAythya marilaWinter visitorUncommon39–56 cmRegularly Oct–May
Marsh WrenCistothorus palustrisSummer visitorUncommon10–14 cmRegularly May–Oct
Blackpoll WarblerSetophaga striataPassage migrantUncommon13–15 cmRegularly May–Oct
American Black DuckAnas rubripesWinter visitorUncommon54–59 cmRegularly Aug–Apr
Scarlet TanagerPiranga olivaceaSummer visitorUncommon16–19 cmRegularly May–Sep
Great Horned OwlBubo virginianusWinter visitorUncommon46–63 cmRecorded all year
Northern WaterthrushParkesia noveboracensisSummer visitorUncommon12–15 cmRegularly Apr–Oct
Willow FlycatcherEmpidonax trailliiSummer visitorUncommon13–17 cmRegularly May–Aug
BobolinkDolichonyx oryzivorusSummer visitorUncommon16–20 cmRegularly May–Sep
Purple MartinProgne subisSummer visitorUncommon18–20 cmRegularly Apr–Sep
Ruddy DuckOxyura jamaicensisWinter visitorUncommon35–43 cmRecorded all year
Bay-breasted WarblerSetophaga castaneaPassage migrantUncommon14–14 cmRegularly May–Sep
DickcisselSpiza americanaSummer visitorUncommon14–16 cmRegularly May–Aug
Least SandpiperCalidris minutillaPassage migrantUncommon13–15 cmRegularly May–Oct
Solitary SandpiperTringa solitariaPassage migrantUncommon19–23 cmRegularly Apr–Oct
Clay-colored SparrowSpizella pallidaSummer visitorUncommon13–15 cmRegularly Apr–Oct
Northern PintailAnas acutaWinter visitorUncommon59–76 cmRegularly Sep–Apr
Greater White-fronted GooseAnser albifronsPassage migrantUncommon64–81 cmRegularly Oct–Apr
Lincoln's SparrowMelospiza lincolniiPassage migrantUncommon13–15 cmRegularly Apr–Oct
Greater YellowlegsTringa melanoleucaPassage migrantUncommon29–40 cmRegularly Apr–Nov
Horned GrebePodiceps auritusPassage migrantUncommon31–38 cmRegularly Sep–May
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