WhenToBird

Salpinctes obsoletus · Troglodytidae

When Do Rock Wrens Arrive in Arizona?

Adult Rock Wren
Photo: Chris Acree, CC BY-SA 4.0 via iNaturalist

Rock Wrens are in Arizona all year, but most are here in fall: numbers build from mid September, peak in late October (8.3% of checklists), and fall back by early January. In the quietest week (early May) they are still on about 2.5% of checklists.

When to look

Numbers buildSep 15-21mid September
PeakOct 22-31late October
Fall back byJan 1-7early January
FewestMay 1-7early May

Best: late October. Here all year; numbers build from mid September and fall back by early January. Peak: on about 8.3% of Arizona checklists.

  1. Jancommon
  2. Febcommon
  3. Marcommon
  4. Aprcommon
  5. Mayuncommon
  6. Jununcommon
  7. Juluncommon
  8. Auguncommon
  9. Seppeak season
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

0%5%10%Jan 1-7: 5.3% of 34758 checklistsJan 8-14: 5.0% of 29835 checklistsJan 15-21: 4.6% of 29279 checklistsJan 22-31: 4.8% of 39716 checklistsFeb 1-7: 4.2% of 27299 checklistsFeb 8-14: 4.3% of 28703 checklistsFeb 15-21: 4.0% of 35357 checklistsFeb 22-28: 4.4% of 29889 checklistsMar 1-7: 4.4% of 29932 checklistsMar 8-14: 4.5% of 32982 checklistsMar 15-21: 4.2% of 34731 checklistsMar 22-31: 3.7% of 50213 checklistsApr 1-7: 3.5% of 35788 checklistsApr 8-14: 2.8% of 38087 checklistsApr 15-21: 2.7% of 41520 checklistsApr 22-30: 2.4% of 55218 checklistsMay 1-7: 2.5% of 39688 checklistsMay 8-14: 2.5% of 39398 checklistsMay 15-21: 2.7% of 29562 checklistsMay 22-31: 2.8% of 36774 checklistsJun 1-7: 3.0% of 21313 checklistsJun 8-14: 2.4% of 19129 checklistsJun 15-21: 2.5% of 17922 checklistsJun 22-30: 2.8% of 21188 checklistsJul 1-7: 2.8% of 17325 checklistsJul 8-14: 2.9% of 16463 checklistsJul 15-21: 2.7% of 18642 checklistsJul 22-31: 2.9% of 31215 checklistsAug 1-7: 2.9% of 28163 checklistsAug 8-14: 3.0% of 31329 checklistsAug 15-21: 3.1% of 23878 checklistsAug 22-31: 3.0% of 28508 checklistsSep 1-7: 4.0% of 20878 checklistsSep 8-14: 4.9% of 19671 checklistsSep 15-21: 5.5% of 19859 checklistsSep 22-30: 6.6% of 25179 checklistsOct 1-7: 7.3% of 19420 checklistsOct 8-14: 7.6% of 21925 checklistsOct 15-21: 8.5% of 20995 checklistsOct 22-31: 8.2% of 29258 checklistsNov 1-7: 8.3% of 21269 checklistsNov 8-14: 7.9% of 22753 checklistsNov 15-21: 7.6% of 21982 checklistsNov 22-30: 7.6% of 29475 checklistsDec 1-7: 7.6% of 20810 checklistsDec 8-14: 7.5% of 22229 checklistsDec 15-21: 7.0% of 25148 checklistsDec 22-31: 6.2% of 39567 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 Arizona 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 Arizona

Best counties

Share of checklists at the peak
  1. Gila CountyBest late October · 307 checklists that week, 14,834 in all17%
  2. Pinal CountyBest the second week of November · 740 checklists that week, 40,036 in all17%
  3. Greenlee CountyBest late October · 53 checklists that week, 2,745 in all15%
  4. Yuma CountyBest the second week of October · 234 checklists that week, 14,687 in all13%
  5. La Paz CountyBest late October · 174 checklists that week, 7,279 in all12%
  6. Mohave CountyBest late October · 441 checklists that week, 18,083 in all12%

Best spots

Share of checklists at the peak
  1. Phoenix South Mountain ParkMaricopa County, best early October · 30 checklists that week, 1,508 in all89%
  2. Coronado National Forest (Road Tank)Cochise County, best late March · 24 checklists that week, 515 in all88%
  3. Tanner Wash Area of Critical Environmental ConcernNavajo County, best late August · 21 checklists that week, 341 in all87%
  4. Coronado National Forest (northeast)Pima County, best late March · 51 checklists that week, 3,681 in all83%
  5. North Mountain PreserveMaricopa County, best the second week of October · 21 checklists that week, 638 in all82%

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

Best time of day

In Arizona, the Rock Wren is most often listed on checklists started between 7 and 9 am (5.5% of those checklists).

0%2%4%6%12 am: too few checklists (488) to judge1 am: too few checklists (503) to judge2 am: too few checklists (489) to judge3 am: too few checklists (735) to judge4 am: too few checklists (4115) to judge5 am: 4.6% of 38350 checklists6 am: 5.3% of 118786 checklists7 am: 5.4% of 183415 checklists8 am: 5.7% of 187346 checklists9 am: 5.2% of 151342 checklists10 am: 4.8% of 124522 checklists11 am: 4.3% of 97088 checklists12 pm: 3.9% of 78110 checklists1 pm: 3.5% of 73059 checklists2 pm: 3.5% of 68912 checklists3 pm: 3.1% of 68060 checklists4 pm: 2.8% of 69387 checklists5 pm: 2.4% of 52951 checklists6 pm: 2.0% of 31061 checklists7 pm: too few checklists (16076) to judge8 pm: too few checklists (5352) to judge9 pm: too few checklists (2369) to judge10 pm: too few checklists (1100) to judge11 pm: too few checklists (604) 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
January5.3%5.0%4.6%4.8%
February4.2%4.3%4.0%4.4%
March4.4%4.5%4.2%3.7%
April3.5%2.8%2.7%2.4%
May2.5%2.5%2.7%2.8%
June3.0%2.4%2.5%2.8%
July2.8%2.9%2.7%2.9%
August2.9%3.0%3.1%3.0%
September4.0%4.9%5.5%6.6%
October7.3%7.6%8.5%8.2%
November8.3%7.9%7.6%7.6%
December7.6%7.5%7.0%6.2%

Neighboring states

  • New Mexico: arrives late February, 21 weeks later than Arizona
  • Nevada: year-round, peaks mid June
  • Utah: arrives mid January, 16 weeks later than Arizona
  • California: year-round, peaks the second week of November

Common questions

When do Rock Wrens arrive in Arizona?
Rock Wrens are in Arizona all year, but most are here in fall: numbers build from mid September, peak in late October (8.3% of checklists), and fall back by early January. In the quietest week (early May) they are still on about 2.5% of checklists.
When do Rock Wrens leave Arizona?
Rock Wrens never fully leave Arizona: numbers fall back below half their usual rate by early January, but some are still reported in every week, about 2.5% of checklists at the low.
When is the best time to see a Rock Wren in Arizona?
The Rock Wren is reported most often in late October, on about 8.3% of Arizona checklists.
Where in Arizona are Rock Wrens seen most often?
By county, Gila County, Pinal County, and Greenlee County have the highest peak reporting rates for the Rock Wren (counties with at least 200 checklists).