WhenToBird

Empidonax oberholseri · Tyrannidae

When Do Dusky Flycatchers Arrive in Utah?

Adult Dusky Flycatcher
Photo: datadan, CC BY 4.0 via iNaturalist

Dusky Flycatchers reach Utah in late April, are common by early May, peak in late May (5.8% of checklists), and most are gone by mid September.

When to look

First arrivalsApr 22-30late April
Common byMay 1-7early May
PeakMay 22-31late May
Most gone bySep 15-21mid September

Best: late May. First arrivals late April; most are gone by mid September. Peak: on about 5.8% of Utah checklists.

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

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

0%2%4%6%8%Jan 1-7: 0% of 10857 checklistsJan 8-14: 0% of 8333 checklistsJan 15-21: 0% of 8360 checklistsJan 22-31: 0% of 10516 checklistsFeb 1-7: 0% of 7416 checklistsFeb 8-14: 0% of 8082 checklistsFeb 15-21: 0% of 9643 checklistsFeb 22-28: 0% of 7960 checklistsMar 1-7: 0% of 7998 checklistsMar 8-14: 0% of 8581 checklistsMar 15-21: 0% of 8637 checklistsMar 22-31: 0% of 13006 checklistsApr 1-7: 0% of 10562 checklistsApr 8-14: 0.1% of 11694 checklistsApr 15-21: 0.1% of 11382 checklistsApr 22-30: 0.6% of 16626 checklistsMay 1-7: 2.9% of 13523 checklistsMay 8-14: 4.4% of 14714 checklistsMay 15-21: 6.0% of 13711 checklistsMay 22-31: 5.8% of 16546 checklistsJun 1-7: 5.6% of 10284 checklistsJun 8-14: 5.0% of 9530 checklistsJun 15-21: 5.1% of 8854 checklistsJun 22-30: 4.5% of 10566 checklistsJul 1-7: 3.4% of 7987 checklistsJul 8-14: 3.8% of 7471 checklistsJul 15-21: 3.5% of 7240 checklistsJul 22-31: 2.9% of 9329 checklistsAug 1-7: 2.6% of 6521 checklistsAug 8-14: 2.3% of 6423 checklistsAug 15-21: 2.2% of 6208 checklistsAug 22-31: 2.9% of 9089 checklistsSep 1-7: 3.3% of 7081 checklistsSep 8-14: 2.8% of 7306 checklistsSep 15-21: 1.9% of 7208 checklistsSep 22-30: 1.0% of 8876 checklistsOct 1-7: 0.4% of 7265 checklistsOct 8-14: 0.1% of 7226 checklistsOct 15-21: 0.1% of 7007 checklistsOct 22-31: 0% of 8443 checklistsNov 1-7: 0% of 6711 checklistsNov 8-14: 0% of 6290 checklistsNov 15-21: 0% of 6169 checklistsNov 22-30: 0.1% of 8228 checklistsDec 1-7: 0.1% of 6011 checklistsDec 8-14: 0.1% of 6044 checklistsDec 15-21: 0.1% of 6721 checklistsDec 22-31: 0% of 9982 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 Utah 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 Utah

Best counties

Share of checklists at the peak
  1. Sanpete CountyBest late May · 179 checklists that week, 6,190 in all25%
  2. Morgan CountyBest the second week of June · 85 checklists that week, 3,178 in all20%
  3. Piute CountyBest mid June · 29 checklists that week, 1,035 in all18%
  4. Beaver CountyBest early June · 103 checklists that week, 6,956 in all14%
  5. Davis CountyBest early September · 845 checklists that week, 39,952 in all12%
  6. Wasatch CountyBest early June · 335 checklists that week, 7,780 in all11%

Best spots

Share of checklists at the peak
  1. Little Emigration CanyonMorgan County, best early June · 28 checklists that week, 154 in all63%
  2. Antelope Island State ParkDavis County, best early September · 161 checklists that week, 2,493 in all47%
  3. Vickory CanyonTooele County, best late May · 20 checklists that week, 155 in all44%
  4. Yellow Fork CanyonSalt Lake County, best mid May · 51 checklists that week, 817 in all42%
  5. Pine Valley ReservoirWashington County, best the second week of May · 21 checklists that week, 265 in all41%
  6. Wasatch National ForestSalt Lake County, best the second week of June · 22 checklists that week, 265 in all39%

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

Best time of day

In Utah, the Dusky Flycatcher is most often listed on checklists started between 6 and 8 am (3.8% of those checklists).

0%2%4%6%12 am: too few checklists (242) to judge1 am: too few checklists (178) to judge2 am: too few checklists (169) to judge3 am: too few checklists (162) to judge4 am: too few checklists (284) to judge5 am: too few checklists (1984) to judge6 am: 6.0% of 11714 checklists7 am: 3.1% of 33209 checklists8 am: 2.2% of 46944 checklists9 am: 1.9% of 46290 checklists10 am: 1.6% of 43144 checklists11 am: 1.4% of 36893 checklists12 pm: 1.1% of 32758 checklists1 pm: 1.1% of 30142 checklists2 pm: 1.0% of 29414 checklists3 pm: 0.9% of 29491 checklists4 pm: 0.9% of 29154 checklists5 pm: 1.3% of 22256 checklists6 pm: 1.5% of 17383 checklists7 pm: 1.5% of 13099 checklists8 pm: too few checklists (6647) to judge9 pm: too few checklists (1753) to judge10 pm: too few checklists (599) to judge11 pm: too few checklists (307) 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%0.1%0.1%0.6%
May2.9%4.4%6.0%5.8%
June5.6%5.0%5.1%4.5%
July3.4%3.8%3.5%2.9%
August2.6%2.3%2.2%2.9%
September3.3%2.8%1.9%1.0%
October0.4%0.1%0.1%0%
November0%0%0%0.1%
December0.1%0.1%0.1%0%

Neighboring states

  • Wyoming: arrives the second week of May, 2 weeks later than Utah
  • Nevada: arrives the second week of April, 2 weeks earlier than Utah
  • Colorado: arrives early May, 1 week later than Utah
  • Idaho: arrives late April, in the same week than Utah

Common questions

When do Dusky Flycatchers arrive in Utah?
Dusky Flycatchers reach Utah in late April, are common by early May, peak in late May (5.8% of checklists), and most are gone by mid September.
When do Dusky Flycatchers leave Utah?
Most Dusky Flycatchers have left Utah by mid September, when reports fall below half their usual rate. Stragglers are still reported until late September.
When is the best time to see a Dusky Flycatcher in Utah?
The Dusky Flycatcher is reported most often in late May, on about 5.8% of Utah checklists.
Where in Utah are Dusky Flycatchers seen most often?
By county, Sanpete County, Morgan County, and Piute County have the highest peak reporting rates for the Dusky Flycatcher (counties with at least 200 checklists).