WhenToBird

Aphelocoma woodhouseii · Corvidae

When Do Woodhouse's Scrub-Jays Arrive in Utah?

Adult Woodhouse's Scrub-Jay
Photo: Daughter Dad, CC BY 4.0 via iNaturalist

The Woodhouse's Scrub-Jay is in Utah all year. It turns up on about 19% of checklists at its peak (mid October) and on 8.8% in its quietest week (mid June).

When to look

PresentAll year
Peak weekOct 15-21mid October
Quietest weekJun 15-21mid June

Best: mid October. Here all year. Peak: on about 19% of Utah checklists.

  1. Jancommon
  2. Febcommon
  3. Marcommon
  4. Aprcommon
  5. Maycommon
  6. Juncommon
  7. Julcommon
  8. Augpeak season
  9. Seppeak season
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

0%5%10%15%20%Jan 1-7: 14% of 10857 checklistsJan 8-14: 13% of 8333 checklistsJan 15-21: 12% of 8360 checklistsJan 22-31: 14% of 10516 checklistsFeb 1-7: 13% of 7416 checklistsFeb 8-14: 14% of 8082 checklistsFeb 15-21: 14% of 9643 checklistsFeb 22-28: 14% of 7960 checklistsMar 1-7: 14% of 7998 checklistsMar 8-14: 14% of 8581 checklistsMar 15-21: 14% of 8637 checklistsMar 22-31: 12% of 13006 checklistsApr 1-7: 12% of 10562 checklistsApr 8-14: 10% of 11694 checklistsApr 15-21: 10% of 11382 checklistsApr 22-30: 11% of 16626 checklistsMay 1-7: 12% of 13523 checklistsMay 8-14: 12% of 14714 checklistsMay 15-21: 11% of 13711 checklistsMay 22-31: 11% of 16546 checklistsJun 1-7: 9.9% of 10284 checklistsJun 8-14: 8.9% of 9530 checklistsJun 15-21: 8.5% of 8854 checklistsJun 22-30: 9.0% of 10566 checklistsJul 1-7: 9.2% of 7987 checklistsJul 8-14: 9.2% of 7471 checklistsJul 15-21: 10% of 7240 checklistsJul 22-31: 11% of 9329 checklistsAug 1-7: 13% of 6521 checklistsAug 8-14: 14% of 6423 checklistsAug 15-21: 14% of 6208 checklistsAug 22-31: 16% of 9089 checklistsSep 1-7: 17% of 7081 checklistsSep 8-14: 17% of 7306 checklistsSep 15-21: 18% of 7208 checklistsSep 22-30: 19% of 8876 checklistsOct 1-7: 19% of 7265 checklistsOct 8-14: 18% of 7226 checklistsOct 15-21: 20% of 7007 checklistsOct 22-31: 20% of 8443 checklistsNov 1-7: 17% of 6711 checklistsNov 8-14: 16% of 6290 checklistsNov 15-21: 16% of 6169 checklistsNov 22-30: 16% of 8228 checklistsDec 1-7: 16% of 6011 checklistsDec 8-14: 15% of 6044 checklistsDec 15-21: 17% of 6721 checklistsDec 22-31: 14% 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. Grand CountyBest the second week of November · 354 checklists that week, 18,662 in all34%
  2. Garfield CountyBest the second week of December · 48 checklists that week, 10,367 in all32%
  3. Salt Lake CountyBest mid October · 1474 checklists that week, 104,432 in all30%
  4. San Juan CountyBest the second week of September · 163 checklists that week, 6,877 in all27%
  5. Tooele CountyBest mid January · 56 checklists that week, 4,788 in all24%
  6. Carbon CountyBest the second week of August · 64 checklists that week, 3,753 in all24%

Best spots

Share of checklists at the peak
  1. Dimple Dell ParkSalt Lake County, best the second week of May · 22 checklists that week, 615 in all93%
  2. Crestwood Outdoor PoolSalt Lake County, best late April · 29 checklists that week, 546 in all89%
  3. Highland GlenUtah County, best mid February · 26 checklists that week, 792 in all88%
  4. 418011 Roadless AreaUtah County, best mid February · 31 checklists that week, 764 in all87%
  5. Yellow Fork CanyonSalt Lake County, best late August · 21 checklists that week, 817 in all83%
  6. Olympus Hills ParkSalt Lake County, best late May · 21 checklists that week, 367 in all77%

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

Best time of day

In Utah, the Woodhouse's Scrub-Jay is most often listed on checklists started between 7 and 9 am (18% of those checklists).

0%5%10%15%20%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: 13% of 11714 checklists7 am: 17% of 33209 checklists8 am: 19% of 46944 checklists9 am: 17% of 46290 checklists10 am: 14% of 43144 checklists11 am: 13% of 36893 checklists12 pm: 11% of 32758 checklists1 pm: 12% of 30142 checklists2 pm: 11% of 29414 checklists3 pm: 12% of 29491 checklists4 pm: 11% of 29154 checklists5 pm: 10% of 22256 checklists6 pm: 11% of 17383 checklists7 pm: 9.0% 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
January14%13%12%14%
February13%14%14%14%
March14%14%14%12%
April12%10%10%11%
May12%12%11%11%
June9.9%8.9%8.5%9.0%
July9.2%9.2%10%11%
August13%14%14%16%
September17%17%18%19%
October19%18%20%20%
November17%16%16%16%
December16%15%17%14%

Neighboring states

  • Nevada: year-round, peaks mid August
  • Colorado: year-round, peaks early October
  • New Mexico: year-round, peaks early October
  • Arizona: year-round, peaks late September

Common questions

When do Woodhouse's Scrub-Jays arrive in Utah?
The Woodhouse's Scrub-Jay is in Utah all year. It turns up on about 19% of checklists at its peak (mid October) and on 8.8% in its quietest week (mid June).
When do Woodhouse's Scrub-Jays leave Utah?
The Woodhouse's Scrub-Jay does not leave Utah: it is reported all year, from 8.8% of checklists in mid June to 19% in mid October.
When is the best time to see a Woodhouse's Scrub-Jay in Utah?
The Woodhouse's Scrub-Jay is reported most often in mid October, on about 19% of Utah checklists.
Where in Utah are Woodhouse's Scrub-Jays seen most often?
By county, Grand County, Garfield County, and Salt Lake County have the highest peak reporting rates for the Woodhouse's Scrub-Jay (counties with at least 200 checklists).