WhenToBird

Euphagus cyanocephalus · Icteridae

Brewer's Blackbird: When and Where to See It

Adult Brewer's Blackbird
Photo: William Harmon, CC BY 4.0 via iNaturalist

The Brewer's Blackbird reaches Nebraska first, around the second week of March, and North Dakota last, around mid April.

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: 1.8% of 1114036 checklistsJan 8-14: 1.7% of 824708 checklistsJan 15-21: 1.7% of 825978 checklistsJan 22-31: 1.7% of 1105853 checklistsFeb 1-7: 1.5% of 779772 checklistsFeb 8-14: 1.4% of 864504 checklistsFeb 15-21: 1.2% of 1127933 checklistsFeb 22-28: 1.5% of 840124 checklistsMar 1-7: 1.5% of 839610 checklistsMar 8-14: 1.4% of 870138 checklistsMar 15-21: 1.6% of 898456 checklistsMar 22-31: 1.6% of 1335637 checklistsApr 1-7: 1.7% 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: 2.1% of 1449080 checklistsMay 8-14: 2.2% of 1538353 checklistsMay 15-21: 2.4% of 1219898 checklistsMay 22-31: 3.0% of 1452282 checklistsJun 1-7: 3.1% of 900636 checklistsJun 8-14: 3.2% of 829907 checklistsJun 15-21: 3.2% of 773255 checklistsJun 22-30: 3.1% of 916255 checklistsJul 1-7: 2.7% of 717733 checklistsJul 8-14: 2.5% of 658223 checklistsJul 15-21: 2.3% of 638752 checklistsJul 22-31: 2.1% of 895727 checklistsAug 1-7: 1.9% of 655651 checklistsAug 8-14: 2.0% of 650038 checklistsAug 15-21: 2.0% of 654639 checklistsAug 22-31: 2.0% of 974928 checklistsSep 1-7: 2.1% of 765914 checklistsSep 8-14: 2.3% of 738674 checklistsSep 15-21: 2.4% of 750433 checklistsSep 22-30: 2.4% of 944196 checklistsOct 1-7: 2.2% of 760106 checklistsOct 8-14: 2.1% of 793131 checklistsOct 15-21: 2.0% of 728727 checklistsOct 22-31: 2.0% of 959954 checklistsNov 1-7: 1.8% of 709464 checklistsNov 8-14: 1.9% of 693424 checklistsNov 15-21: 1.8% of 653952 checklistsNov 22-30: 1.8% of 871137 checklistsDec 1-7: 1.7% of 627591 checklistsDec 8-14: 1.7% of 642427 checklistsDec 15-21: 1.7% 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 %
NebraskaSummer visitorMar 8-14Jun 15-21Jul 15-211.2%
IdahoSummer visitorMar 15-21May 15-21Sep 15-2119%
MinnesotaSummer visitorMar 22-31Jun 15-21Aug 8-141.4%
OregonAll year, most in springApr 8-14May 22-31Jul 1-716%
MontanaSummer visitorApr 8-14Jun 15-21Sep 22-3014%
UtahAll year, most in summerApr 8-14May 8-14Jul 15-218.6%
WashingtonAll year, most in summerApr 8-14May 22-31Jul 15-218.6%
ColoradoSummer visitorApr 8-14Jun 15-21Oct 1-77.3%
South DakotaSummer visitorApr 8-14Jun 15-21Nov 8-144.5%
WyomingSummer visitorApr 15-21Sep 8-14Oct 1-718%
North DakotaSummer visitorApr 15-21Jun 15-21Aug 1-712%
KansasSummer visitorOct 8-14Apr 8-14Apr 22-301.5%
OklahomaSummer visitorNov 1-7Apr 1-7Apr 22-302.1%
TexasWinter visitorOct 15-21Dec 1-7Apr 22-301.7%
ArkansasWinter visitorNov 1-7Mar 1-7Apr 1-71.1%
New MexicoWinter visitorAug 22-31Oct 1-7Jul 1-75.5%
ArizonaWinter visitorSep 1-7Oct 8-14Jul 1-75.6%
NevadaYear-round–Jun 22-30–15%
CaliforniaYear-round–Jun 8-14–13%

Winter visitor in: Texas, Arkansas, New Mexico, Arizona

Summer visitor in: Wyoming, Kansas, Oklahoma