WhenToBird

Contopus cooperi · Tyrannidae

Olive-sided Flycatcher: When and Where to See It

Adult Olive-sided Flycatcher
Photo: Brooke J., CC BY 4.0 via iNaturalist

The Olive-sided Flycatcher reaches California first, around mid April, and Wyoming last, around late 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%0.5%1%1.5%2%Jan 1-7: 0.1% of 1114036 checklistsJan 8-14: 0.1% of 824708 checklistsJan 15-21: 0% of 825978 checklistsJan 22-31: 0% of 1105853 checklistsFeb 1-7: 0.1% of 779772 checklistsFeb 8-14: 0.1% of 864504 checklistsFeb 15-21: 0.1% of 1127933 checklistsFeb 22-28: 0.1% of 840124 checklistsMar 1-7: 0.1% of 839610 checklistsMar 8-14: 0.1% of 870138 checklistsMar 15-21: 0.1% of 898456 checklistsMar 22-31: 0.1% of 1335637 checklistsApr 1-7: 0.1% of 1030617 checklistsApr 8-14: 0.1% of 1124024 checklistsApr 15-21: 0.1% of 1194575 checklistsApr 22-30: 0.3% of 1675723 checklistsMay 1-7: 0.6% of 1449080 checklistsMay 8-14: 0.9% of 1538353 checklistsMay 15-21: 1.5% of 1219898 checklistsMay 22-31: 1.8% of 1452282 checklistsJun 1-7: 1.5% of 900636 checklistsJun 8-14: 1.2% of 829907 checklistsJun 15-21: 1.1% of 773255 checklistsJun 22-30: 1.0% of 916255 checklistsJul 1-7: 0.8% of 717733 checklistsJul 8-14: 0.8% of 658223 checklistsJul 15-21: 0.9% of 638752 checklistsJul 22-31: 0.9% of 895727 checklistsAug 1-7: 0.8% of 655651 checklistsAug 8-14: 0.8% of 650038 checklistsAug 15-21: 1.0% of 654639 checklistsAug 22-31: 1.3% of 974928 checklistsSep 1-7: 1.3% of 765914 checklistsSep 8-14: 1.0% of 738674 checklistsSep 15-21: 0.6% of 750433 checklistsSep 22-30: 0.2% of 944196 checklistsOct 1-7: 0.1% of 760106 checklistsOct 8-14: 0.1% of 793131 checklistsOct 15-21: 0.1% of 728727 checklistsOct 22-31: 0.1% of 959954 checklistsNov 1-7: 0.1% of 709464 checklistsNov 8-14: 0.1% of 693424 checklistsNov 15-21: 0.1% of 653952 checklistsNov 22-30: 0.1% of 871137 checklistsDec 1-7: 0% of 627591 checklistsDec 8-14: 0% of 642427 checklistsDec 15-21: 0% of 775638 checklistsDec 22-31: 0.1% 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 %
CaliforniaSummer visitorApr 15-21May 22-31Aug 1-75.1%
NevadaSummer visitorApr 22-30May 15-21Sep 15-216.0%
ArizonaSummer visitorApr 22-30May 8-14Jun 8-142.2%
OregonSummer visitorMay 1-7Jun 1-7Aug 8-145.9%
WashingtonSummer visitorMay 1-7Jun 8-14Aug 8-146.4%
AlaskaSummer visitorMay 8-14Jun 8-14Aug 15-212.2%
IllinoisPasses throughMay 8-14May 22-31Jun 1-72.2%
WisconsinPasses throughMay 8-14May 22-31Jun 1-71.5%
IdahoSummer visitorMay 15-21Aug 8-14Sep 8-143.0%
ColoradoSummer visitorMay 15-21Jun 1-7Sep 8-141.9%
MaineSummer visitorMay 15-21Jun 1-7Sep 8-141.2%
New HampshireSummer visitorMay 15-21Aug 22-31Sep 15-211.0%
UtahSummer visitorMay 15-21Aug 22-31Sep 8-142.3%
VermontSummer visitorMay 15-21Jun 8-14Sep 8-141.1%
MontanaSummer visitorMay 22-31Jun 15-21Aug 22-312.9%
WyomingSummer visitorMay 22-31Jun 22-30Sep 1-73.0%
New MexicoSummer visitorAug 1-7Sep 1-7Sep 15-215.8%
North DakotaPasses throughAug 1-7Aug 22-31Sep 8-143.9%
IowaPasses throughAug 8-14Sep 1-7Sep 15-214.3%
KansasPasses throughAug 8-14Sep 8-14Sep 22-303.7%
MinnesotaPasses throughAug 8-14Aug 22-31Sep 8-144.2%
IndianaSummer visitorAug 8-14Sep 1-7Sep 22-301.2%
MichiganPasses throughAug 8-14Sep 1-7Sep 15-211.8%
South DakotaPasses throughAug 8-14Aug 22-31Sep 15-212.0%
TexasSummer visitorAug 8-14Sep 1-7Oct 1-72.5%
NebraskaPasses throughAug 15-21Sep 1-7Sep 22-303.8%
District of ColumbiaPasses throughAug 15-21Aug 22-31Sep 15-211.0%
LouisianaPasses throughAug 15-21Sep 1-7Sep 15-211.1%
MissouriSummer visitorAug 15-21Sep 8-14Sep 22-301.7%
OklahomaPasses throughAug 15-21Sep 8-14Sep 22-301.8%

Passes through: North Dakota, Iowa, Kansas, Minnesota, Michigan, South Dakota, Nebraska, District of Columbia, Louisiana, Oklahoma

Summer visitor in: New Hampshire, Utah, New Mexico, Indiana, Texas, Missouri