New World Warblers in Ontario
Our list for Ontario has 19 new world warblers recorded regularly there: 16 summer visitors and 3 passage migrants
Most likely in October
GBIF · OctShare of all bird records in Ontario in October, 2019–2024. Each month links to that month’s page.
All 19, most common first
Northern Yellow WarblerSetophaga aestivaSummer visitorCommon12–13 cmRegularly Apr–Sep
Common YellowthroatGeothlypis trichasSummer visitorCommon11–13 cmRegularly May–Oct
Yellow-rumped WarblerSetophaga coronataSummer visitorCommon12–15 cmRegularly Apr–Nov
American RedstartSetophaga ruticillaSummer visitorCommon11–14 cmRegularly May–Sep
OvenbirdSeiurus aurocapillaSummer visitorCommon12–15 cmRegularly May–Sep
Chestnut-sided WarblerSetophaga pensylvanicaSummer visitorCommon10–14 cmRegularly May–Sep
Magnolia WarblerSetophaga magnoliaSummer visitorCommon11–13 cmRegularly May–Oct
Nashville WarblerLeiothlypis ruficapillaSummer visitorCommon11–13 cmRegularly Apr–Oct
Black-throated Green WarblerSetophaga virensSummer visitorCommon11–12 cmRegularly Apr–Oct
Palm WarblerSetophaga palmarumPassage migrantCommon12–14 cmRegularly Apr–Oct
Bay-breasted WarblerSetophaga castaneaSummer visitorCommon14–14 cmRegularly May–Sep
Cape May WarblerSetophaga tigrinaPassage migrantUncommon12–14 cmRegularly May–Sep
Tennessee WarblerLeiothlypis peregrinaSummer visitorUncommon10–13 cmRegularly May–Oct
Black-throated Blue WarblerSetophaga caerulescensSummer visitorUncommon11–13 cmRegularly May–Oct
Blackpoll WarblerSetophaga striataPassage migrantUncommon13–15 cmRegularly May–Oct
Northern WaterthrushParkesia noveboracensisSummer visitorUncommon12–15 cmRegularly Apr–Sep
Mourning WarblerGeothlypis philadelphiaSummer visitorUncommon10–15 cmRegularly May–Sep
Orange-crowned WarblerLeiothlypis celataSummer visitorUncommon11–14 cmRegularly May–Jan
Prothonotary WarblerProtonotaria citreaSummer visitorUncommon13–14 cmRegularly May–Jul
Smallest to largest
Length, cm- Black-throated Green Warbler 11–12 cm
- Tennessee Warbler 10–13 cm
- Common Yellowthroat 11–13 cm
- Chestnut-sided Warbler 10–14 cm
- Magnolia Warbler 11–13 cm
- Nashville Warbler 11–13 cm
- Black-throated Blue Warbler 11–13 cm
- Northern Yellow Warbler 12–13 cm
- American Redstart 11–14 cm
- Mourning Warbler 10–15 cm
- Orange-crowned Warbler 11–14 cm
- Palm Warbler 12–14 cm
- Cape May Warbler 12–14 cm
- Yellow-rumped Warbler 12–15 cm
- Ovenbird 12–15 cm
- Northern Waterthrush 12–15 cm
- Prothonotary Warbler 13–14 cm
- Bay-breasted Warbler 14–14 cm
- Blackpoll Warbler 13–15 cm
Body length, bill to tail. Rare birds in grey.
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