WhenToBird

Empidonax virescens · Tyrannidae

When Do Acadian Flycatchers Arrive in Kansas?

Adult Acadian Flycatcher
Photo: Amber M. King, CC BY 4.0 via iNaturalist

Acadian Flycatchers arrive in Kansas in early May, peak in late May (3.1% of checklists), and most are gone by early August.

When to look

First arrivalsMay 1-7early May
Common byMay 1-7early May
PeakMay 22-31late May
Most gone byAug 1-7early August

Best: late May. First arrivals early May; most are gone by early August. Peak: on about 3.1% of Kansas checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marnot usually seen
  4. Apruncommon
  5. Maypeak season
  6. Junpeak season
  7. Julcommon
  8. Auguncommon
  9. Seprare
  10. Octnot usually seen
  11. Novnot usually seen
  12. Decnot usually seen

Darker months: more checklists report it. Outlined: peak month.

0%1%2%3%4%Jan 1-7: 0% of 8683 checklistsJan 8-14: 0% of 5710 checklistsJan 15-21: 0% of 5453 checklistsJan 22-31: 0% of 7868 checklistsFeb 1-7: 0% of 5579 checklistsFeb 8-14: 0% of 6307 checklistsFeb 15-21: 0% of 7830 checklistsFeb 22-28: 0% of 6124 checklistsMar 1-7: 0% of 6442 checklistsMar 8-14: 0% of 6925 checklistsMar 15-21: 0% of 7257 checklistsMar 22-31: 0% of 11527 checklistsApr 1-7: 0% of 8908 checklistsApr 8-14: 0% of 11070 checklistsApr 15-21: 0% of 11050 checklistsApr 22-30: 0.1% of 16381 checklistsMay 1-7: 1.3% of 15899 checklistsMay 8-14: 2.9% of 15349 checklistsMay 15-21: 3.6% of 10474 checklistsMay 22-31: 2.8% of 11264 checklistsJun 1-7: 2.8% of 6783 checklistsJun 8-14: 2.8% of 5654 checklistsJun 15-21: 2.0% of 4716 checklistsJun 22-30: 2.0% of 6232 checklistsJul 1-7: 2.3% of 5073 checklistsJul 8-14: 1.5% of 4528 checklistsJul 15-21: 1.1% of 4210 checklistsJul 22-31: 1.3% of 5986 checklistsAug 1-7: 1.1% of 4661 checklistsAug 8-14: 0.7% of 4762 checklistsAug 15-21: 0.6% of 4823 checklistsAug 22-31: 0.5% of 7214 checklistsSep 1-7: 0.4% of 5989 checklistsSep 8-14: 0.3% of 5549 checklistsSep 15-21: 0.1% of 5255 checklistsSep 22-30: 0% of 7370 checklistsOct 1-7: 0% of 5829 checklistsOct 8-14: 0% of 6183 checklistsOct 15-21: 0% of 5504 checklistsOct 22-31: 0% of 7289 checklistsNov 1-7: 0% of 5535 checklistsNov 8-14: 0% of 5462 checklistsNov 15-21: 0% of 4929 checklistsNov 22-30: 0% of 6627 checklistsDec 1-7: 0% of 4670 checklistsDec 8-14: 0% of 4805 checklistsDec 15-21: 0% of 6341 checklistsDec 22-31: 0% of 8186 checklistsJanFebMarAprMayJunJulAugSepOctNovDec
Share of complete checklists reporting it, by week (4 per month). Grey bars: fewer than 10 checklists, not counted.

Frequency is the share of complete checklists in Kansas that listed the bird, 2016–2025. It is not a head count, and it follows where and when people go birding. How to read it.

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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Where in Kansas

Best counties

Share of checklists at the peak
  1. Linn CountyBest early July · 54 checklists that week, 2,601 in all46%
  2. Cherokee CountyBest mid June · 18 checklists that week, 1,859 in all20%
  3. Franklin CountyBest mid May · 57 checklists that week, 2,039 in all17%
  4. Wabaunsee CountyBest late May · 77 checklists that week, 1,550 in all16%
  5. Miami CountyBest early June · 57 checklists that week, 5,634 in all16%
  6. Wyandotte CountyBest late May · 91 checklists that week, 3,430 in all13%

Best spots

Share of checklists at the peak
  1. Rice WoodlandDouglas County, best mid May · 27 checklists that week, 132 in all82%
  2. Cedar Niles (Future)Johnson County, best late May · 21 checklists that week, 315 in all60%
  3. Overland Park Arboretum and Botanical GardensJohnson County, best mid May · 32 checklists that week, 1,032 in all44%
  4. Marais Des Cygne Wildlife AreaLinn County, best early June · 24 checklists that week, 470 in all41%

Busy spots report more of everything; compare the checklist counts before you drive anywhere.

Best time of day

In Kansas, the Acadian Flycatcher is most often listed on checklists started between 6 and 8 am (1.8% of those checklists).

0%1%2%3%4%12 am: too few checklists (150) to judge1 am: too few checklists (119) to judge2 am: too few checklists (97) to judge3 am: too few checklists (94) to judge4 am: too few checklists (124) to judge5 am: too few checklists (1459) to judge6 am: 3.1% of 12550 checklists7 am: 1.3% of 34128 checklists8 am: 1.0% of 45960 checklists9 am: 0.8% of 37806 checklists10 am: 0.6% of 32102 checklists11 am: 0.5% of 25896 checklists12 pm: 0.4% of 24203 checklists1 pm: 0.4% of 20269 checklists2 pm: 0.3% of 20772 checklists3 pm: 0.2% of 20978 checklists4 pm: 0.2% of 22094 checklists5 pm: 0.2% of 17739 checklists6 pm: 0.2% of 13963 checklists7 pm: 0.2% of 10110 checklists8 pm: too few checklists (4188) to judge9 pm: too few checklists (968) to judge10 pm: too few checklists (325) to judge11 pm: too few checklists (171) to judge12a3a6a9a12p3p6p9p
Share of checklists started in each local hour that reported it. It reflects when people go birding as well as when birds are active. Grey hours have too few checklists (under 2% of the state’s, or under 200) to judge.
Week-by-week table
MonthDays 1-78-1415-2122-end
January0%0%0%0%
February0%0%0%0%
March0%0%0%0%
April0%0%0%0.1%
May1.3%2.9%3.6%2.8%
June2.8%2.8%2.0%2.0%
July2.3%1.5%1.1%1.3%
August1.1%0.7%0.6%0.5%
September0.4%0.3%0.1%0%
October0%0%0%0%
November0%0%0%0%
December0%0%0%0%

Neighboring states

  • Oklahoma: arrives late April, 1 week earlier than Kansas
  • Missouri: arrives late April, 1 week earlier than Kansas
  • Arkansas: arrives mid April, 2 weeks earlier than Kansas
  • Iowa: arrives the second week of May, 1 week later than Kansas

Common questions

When do Acadian Flycatchers arrive in Kansas?
Acadian Flycatchers arrive in Kansas in early May, peak in late May (3.1% of checklists), and most are gone by early August.
When do Acadian Flycatchers leave Kansas?
Most Acadian Flycatchers have left Kansas by early August, when reports fall below half their usual rate.
When is the best time to see a Acadian Flycatcher in Kansas?
The Acadian Flycatcher is reported most often in late May, on about 3.1% of Kansas checklists.
Where in Kansas are Acadian Flycatchers seen most often?
By county, Linn County, Cherokee County, and Franklin County have the highest peak reporting rates for the Acadian Flycatcher (counties with at least 200 checklists).