WhenToBird

Cistothorus palustris · Troglodytidae

Marsh Wren: When and Where to See It

Adult Marsh Wren
Photo: Kathy Richardson, CC BY 4.0 via iNaturalist

The Marsh Wren reaches Idaho first, around late February, and Maine last, around early May.

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%1%2%3%4%Jan 1-7: 1.5% of 1114036 checklistsJan 8-14: 1.5% of 824708 checklistsJan 15-21: 1.6% of 825978 checklistsJan 22-31: 1.6% of 1105853 checklistsFeb 1-7: 1.4% of 779772 checklistsFeb 8-14: 1.4% of 864504 checklistsFeb 15-21: 1.2% of 1127933 checklistsFeb 22-28: 1.6% of 840124 checklistsMar 1-7: 1.6% of 839610 checklistsMar 8-14: 1.7% of 870138 checklistsMar 15-21: 1.8% of 898456 checklistsMar 22-31: 1.8% of 1335637 checklistsApr 1-7: 1.8% of 1030617 checklistsApr 8-14: 1.8% of 1124024 checklistsApr 15-21: 2.1% of 1194575 checklistsApr 22-30: 2.2% of 1675723 checklistsMay 1-7: 2.5% of 1449080 checklistsMay 8-14: 2.8% of 1538353 checklistsMay 15-21: 3.1% of 1219898 checklistsMay 22-31: 3.2% of 1452282 checklistsJun 1-7: 3.0% of 900636 checklistsJun 8-14: 2.8% of 829907 checklistsJun 15-21: 2.8% of 773255 checklistsJun 22-30: 2.9% of 916255 checklistsJul 1-7: 3.1% of 717733 checklistsJul 8-14: 3.2% of 658223 checklistsJul 15-21: 3.2% of 638752 checklistsJul 22-31: 2.8% of 895727 checklistsAug 1-7: 2.2% of 655651 checklistsAug 8-14: 1.7% of 650038 checklistsAug 15-21: 1.5% of 654639 checklistsAug 22-31: 1.4% of 974928 checklistsSep 1-7: 1.6% of 765914 checklistsSep 8-14: 1.7% of 738674 checklistsSep 15-21: 1.9% of 750433 checklistsSep 22-30: 2.2% of 944196 checklistsOct 1-7: 2.5% of 760106 checklistsOct 8-14: 2.4% of 793131 checklistsOct 15-21: 2.4% of 728727 checklistsOct 22-31: 2.4% of 959954 checklistsNov 1-7: 2.2% of 709464 checklistsNov 8-14: 2.3% of 693424 checklistsNov 15-21: 2.2% of 653952 checklistsNov 22-30: 2.1% of 871137 checklistsDec 1-7: 2.0% of 627591 checklistsDec 8-14: 1.8% of 642427 checklistsDec 15-21: 1.8% of 775638 checklistsDec 22-31: 1.7% 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 %
IdahoSummer visitorFeb 22-28May 15-21Dec 22-313.5%
ColoradoSummer visitorFeb 22-28Apr 15-21Jan 1-71.8%
South CarolinaSummer visitorMar 1-7Jul 15-21Aug 15-213.8%
WashingtonAll year, most in springMar 15-21Apr 22-30Jul 1-711%
WyomingSummer visitorMar 22-31Apr 22-30Oct 1-75.7%
MontanaSummer visitorApr 1-7May 1-7Oct 8-146.7%
Rhode IslandSummer visitorApr 1-7Jun 8-14Jan 8-141.3%
DelawareSummer visitorApr 8-14Jul 15-21Aug 8-1420%
MarylandSummer visitorApr 8-14Apr 22-30Aug 8-141.3%
New JerseySummer visitorApr 15-21Jul 15-21Aug 15-218.1%
IowaSummer visitorApr 15-21Jul 15-21Oct 8-144.6%
ConnecticutSummer visitorApr 22-30Jul 15-21Sep 22-306.3%
IllinoisSummer visitorApr 22-30Jul 8-14Aug 8-145.7%
MinnesotaSummer visitorApr 22-30Jul 8-14Sep 22-307.5%
New YorkSummer visitorApr 22-30Jul 15-21Oct 1-75.1%
OhioSummer visitorApr 22-30May 15-21Aug 8-145.0%
South DakotaSummer visitorApr 22-30Jul 15-21Oct 8-146.6%
WisconsinSummer visitorApr 22-30Jul 8-14Sep 22-307.2%
IndianaSummer visitorApr 22-30May 22-31Aug 8-143.1%
MassachusettsSummer visitorApr 22-30Jun 1-7Sep 22-303.4%
VermontSummer visitorApr 22-30Jul 15-21Sep 8-145.0%
New HampshireSummer visitorApr 22-30Jul 15-21Aug 1-71.8%
PennsylvaniaSummer visitorApr 22-30Jul 22-31Oct 15-211.5%
North DakotaSummer visitorMay 1-7Jul 8-14Aug 1-715%
MichiganSummer visitorMay 1-7Jul 8-14Sep 22-304.5%
MaineSummer visitorMay 1-7Jul 15-21Oct 1-71.8%
UtahAll year, most in fallAug 15-21Sep 8-14Nov 1-76.7%
District of ColumbiaSummer visitorSep 8-14Sep 22-30Oct 15-211.9%
TennesseePasses throughSep 8-14Oct 15-21Jan 1-71.8%
ArkansasPasses throughSep 15-21Oct 8-14Jan 8-142.7%
TexasSummer visitorOct 1-7Apr 8-14May 1-74.0%
FloridaWinter visitorOct 8-14Nov 1-7Apr 22-303.0%
NebraskaWinter visitorApr 15-21Oct 1-7Oct 22-314.6%
KansasWinter visitorSep 1-7Oct 8-14Jan 8-143.0%
MissouriWinter visitorSep 1-7Oct 1-7Nov 8-142.2%
ArizonaWinter visitorSep 8-14Nov 15-21Apr 1-76.6%
VirginiaWinter visitorSep 8-14Oct 8-14Feb 1-71.1%
NevadaAll year, most in winterSep 15-21Mar 8-14Apr 15-2115%
New MexicoWinter visitorSep 15-21Nov 8-14Apr 15-214.6%
GeorgiaWinter visitorSep 15-21Oct 8-14Aug 1-71.7%
North CarolinaWinter visitorSep 15-21Oct 15-21May 8-142.1%
LouisianaWinter visitorSep 22-30Oct 22-31May 1-76.3%
AlabamaWinter visitorSep 22-30Oct 15-21Jan 22-313.0%
MississippiWinter visitorSep 22-30Oct 15-21May 1-74.8%
OklahomaWinter visitorSep 22-30Oct 22-31Jan 1-71.6%
CaliforniaYear-round–Nov 1-7–6.3%
OregonYear-round–Apr 8-14–6.4%

Winter visitor in: Florida, Nebraska, Kansas, Missouri, Arizona, Virginia, Nevada, New Mexico, Georgia, North Carolina, Louisiana, Alabama, Mississippi, Oklahoma

Passes through: Tennessee, Arkansas

Summer visitor in: Colorado, Texas, Utah, District of Columbia