WhenToBird

Spizelloides arborea · Passerellidae

American Tree Sparrow: When and Where to See It

Adult American Tree Sparrow
Photo: Michael, CC BY 4.0 via iNaturalist

The American Tree Sparrow reaches Michigan first, around the second week of October, and Kentucky last, around late November.

JanFebMarAprMayJunJulAugSepOctNovDec
today
Second week of November

Each county is shaded by the share of complete checklists there that listed the bird, blended with the weeks either side. Darker is more often. It follows where people watch birds, not how many birds there are. How to read it.

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0%2%4%6%Jan 1-7: 5.1% of 1114036 checklistsJan 8-14: 5.0% of 824708 checklistsJan 15-21: 5.2% of 825978 checklistsJan 22-31: 5.2% of 1105853 checklistsFeb 1-7: 5.1% of 779772 checklistsFeb 8-14: 5.0% of 864504 checklistsFeb 15-21: 4.5% of 1127933 checklistsFeb 22-28: 4.4% of 840124 checklistsMar 1-7: 4.4% of 839610 checklistsMar 8-14: 4.4% of 870138 checklistsMar 15-21: 3.9% of 898456 checklistsMar 22-31: 3.5% of 1335637 checklistsApr 1-7: 3.2% of 1030617 checklistsApr 8-14: 2.5% of 1124024 checklistsApr 15-21: 1.5% of 1194575 checklistsApr 22-30: 0.8% of 1675723 checklistsMay 1-7: 0.3% of 1449080 checklistsMay 8-14: 0.1% of 1538353 checklistsMay 15-21: 0.1% of 1219898 checklistsMay 22-31: 0.1% of 1452282 checklistsJun 1-7: 0.1% of 900636 checklistsJun 8-14: 0.1% of 829907 checklistsJun 15-21: 0.1% of 773255 checklistsJun 22-30: 0.1% of 916255 checklistsJul 1-7: 0.1% of 717733 checklistsJul 8-14: 0.1% of 658223 checklistsJul 15-21: 0.1% of 638752 checklistsJul 22-31: 0.1% of 895727 checklistsAug 1-7: 0.1% of 655651 checklistsAug 8-14: 0.1% of 650038 checklistsAug 15-21: 0.1% of 654639 checklistsAug 22-31: 0.1% of 974928 checklistsSep 1-7: 0.1% of 765914 checklistsSep 8-14: 0.1% of 738674 checklistsSep 15-21: 0.1% of 750433 checklistsSep 22-30: 0.1% of 944196 checklistsOct 1-7: 0.1% of 760106 checklistsOct 8-14: 0.4% of 793131 checklistsOct 15-21: 0.9% of 728727 checklistsOct 22-31: 2.0% of 959954 checklistsNov 1-7: 3.2% of 709464 checklistsNov 8-14: 4.0% of 693424 checklistsNov 15-21: 4.5% of 653952 checklistsNov 22-30: 4.5% of 871137 checklistsDec 1-7: 4.7% of 627591 checklistsDec 8-14: 4.9% of 642427 checklistsDec 15-21: 5.5% of 775638 checklistsDec 22-31: 4.9% of 1132751 checklistsJanFebMarAprMayJunJulAugSepOctNovDec
Share of complete checklists reporting it, by week (4 per month). Grey bars: fewer than 10 checklists, not counted.

Pooled across every state in the data, so it leans toward states with the most birders.

States, in order of first arrivals

StatePatternFirst arrivalsPeakMost gone byPeak %
District of ColumbiaPasses throughJan 15-21Jan 22-31Feb 8-141.3%
AlaskaSummer visitorApr 22-30Jun 8-14Oct 22-315.2%
MinnesotaWinter visitorOct 1-7Nov 1-7Apr 22-3019%
MontanaWinter visitorOct 1-7Nov 1-7Mar 22-3110%
MichiganWinter visitorOct 8-14Jan 22-31Apr 15-2123%
WisconsinWinter visitorOct 8-14Jan 22-31Apr 15-2118%
South DakotaWinter visitorOct 8-14Mar 8-14Apr 8-1416%
NebraskaWinter visitorOct 15-21Nov 15-21Mar 22-3123%
IowaWinter visitorOct 15-21Dec 8-14Apr 1-722%
IllinoisWinter visitorOct 15-21Jan 15-21Apr 1-722%
ColoradoWinter visitorOct 15-21Nov 8-14Mar 8-1410%
WyomingWinter visitorOct 15-21Mar 1-7Mar 22-316.2%
KansasWinter visitorOct 22-31Dec 15-21Mar 8-1419%
IndianaWinter visitorOct 22-31Jan 22-31Mar 15-2117%
OhioWinter visitorOct 22-31Jan 22-31Apr 1-717%
VermontWinter visitorOct 22-31Jan 22-31Apr 1-717%
New YorkWinter visitorOct 22-31Feb 1-7Mar 22-3113%
MaineWinter visitorOct 22-31Dec 15-21Apr 1-710%
New HampshireWinter visitorOct 22-31Jan 15-21Mar 22-3111%
IdahoWinter visitorOct 22-31Jan 8-14Mar 15-211.6%
MissouriWinter visitorNov 1-7Jan 22-31Mar 8-1410%
MassachusettsWinter visitorNov 1-7Dec 8-14Mar 22-319.8%
ConnecticutWinter visitorNov 1-7Jan 15-21Mar 15-217.3%
UtahWinter visitorNov 1-7Dec 1-7Mar 1-71.8%
PennsylvaniaWinter visitorNov 8-14Feb 1-7Mar 15-215.8%
Rhode IslandWinter visitorNov 8-14Dec 8-14Mar 15-217.0%
New JerseyWinter visitorNov 8-14Feb 1-7Mar 15-214.5%
MarylandWinter visitorNov 15-21Jan 22-31Mar 15-211.2%
OklahomaWinter visitorNov 15-21Dec 8-14Feb 15-211.8%
West VirginiaWinter visitorNov 15-21Jan 15-21Mar 8-142.1%
KentuckyWinter visitorNov 22-30Jan 15-21Mar 8-142.8%
North DakotaWinter visitorSep 22-30Oct 22-31May 1-717%

Winter visitor in: Minnesota, Montana, North Dakota

Passes through: District of Columbia

Summer visitor in: Alaska