WhenToBird

Poecile rufescens · Paridae

When Do Chestnut-backed Chickadees Arrive in Washington?

Adult Chestnut-backed Chickadee
Photo: John Rosford, CC BY 4.0 via iNaturalist

The Chestnut-backed Chickadee is in Washington all year. It turns up on about 26% of checklists at its peak (early August) and on 19% in its quietest week (late January).

When to look

PresentAll year
Peak weekAug 1-7early August
Quietest weekJan 22-31late January

Best: early August. Here all year. Peak: on about 26% of Washington checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marpeak season
  4. Aprpeak season
  5. Maypeak season
  6. Junpeak season
  7. Julpeak season
  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%10%20%30%Jan 1-7: 19% of 41928 checklistsJan 8-14: 19% of 31152 checklistsJan 15-21: 19% of 31753 checklistsJan 22-31: 18% of 42530 checklistsFeb 1-7: 19% of 29739 checklistsFeb 8-14: 20% of 32746 checklistsFeb 15-21: 22% of 40328 checklistsFeb 22-28: 20% of 28432 checklistsMar 1-7: 21% of 30758 checklistsMar 8-14: 21% of 29368 checklistsMar 15-21: 22% of 32580 checklistsMar 22-31: 23% of 45614 checklistsApr 1-7: 23% of 33997 checklistsApr 8-14: 22% of 34729 checklistsApr 15-21: 21% of 38474 checklistsApr 22-30: 21% of 52185 checklistsMay 1-7: 20% of 44236 checklistsMay 8-14: 19% of 48708 checklistsMay 15-21: 19% of 41742 checklistsMay 22-31: 19% of 57082 checklistsJun 1-7: 19% of 39193 checklistsJun 8-14: 21% of 36042 checklistsJun 15-21: 22% of 34003 checklistsJun 22-30: 23% of 39711 checklistsJul 1-7: 25% of 31949 checklistsJul 8-14: 25% of 29086 checklistsJul 15-21: 25% of 28045 checklistsJul 22-31: 26% of 38275 checklistsAug 1-7: 26% of 28846 checklistsAug 8-14: 25% of 28036 checklistsAug 15-21: 25% of 27614 checklistsAug 22-31: 24% of 40356 checklistsSep 1-7: 24% of 31214 checklistsSep 8-14: 23% of 27795 checklistsSep 15-21: 23% of 29677 checklistsSep 22-30: 23% of 35241 checklistsOct 1-7: 22% of 28605 checklistsOct 8-14: 22% of 28655 checklistsOct 15-21: 20% of 24643 checklistsOct 22-31: 20% of 34874 checklistsNov 1-7: 20% of 25658 checklistsNov 8-14: 20% of 25700 checklistsNov 15-21: 20% of 24331 checklistsNov 22-30: 21% of 32784 checklistsDec 1-7: 21% of 24099 checklistsDec 8-14: 22% of 23339 checklistsDec 15-21: 23% of 27666 checklistsDec 22-31: 22% of 42130 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 Washington 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.

Embed this map on your site

Where in Washington

Best counties

Share of checklists at the peak
  1. San Juan CountyBest late August · 1248 checklists that week, 35,337 in all48%
  2. Mason CountyBest early August · 484 checklists that week, 27,853 in all41%
  3. Skamania CountyBest early April · 166 checklists that week, 10,140 in all39%
  4. Thurston CountyBest early August · 1070 checklists that week, 68,352 in all39%
  5. Island CountyBest early April · 927 checklists that week, 46,092 in all38%
  6. Jefferson CountyBest mid July · 1249 checklists that week, 59,663 in all35%

Best spots

Share of checklists at the peak
  1. San Juan Islands National MonumentSan Juan County, best the second week of August · 47 checklists that week, 2,639 in all97%
  2. Burton Acres ParkKing County, best early April · 23 checklists that week, 642 in all95%
  3. Railroad Bridge ParkClallam County, best early October · 42 checklists that week, 1,941 in all91%
  4. Carillon WoodsKing County, best the second week of May · 26 checklists that week, 273 in all89%
  5. Washington ParkSkagit County, best late August · 34 checklists that week, 1,066 in all88%

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

Best time of day

In Washington, the Chestnut-backed Chickadee is most often listed on checklists started between 6 and 8 am (27% of those checklists).

0%10%20%30%12 am: too few checklists (796) to judge1 am: too few checklists (776) to judge2 am: too few checklists (709) to judge3 am: too few checklists (901) to judge4 am: too few checklists (3221) to judge5 am: too few checklists (16576) to judge6 am: 27% of 56744 checklists7 am: 27% of 133294 checklists8 am: 27% of 184196 checklists9 am: 24% of 186303 checklists10 am: 22% of 177063 checklists11 am: 21% of 154936 checklists12 pm: 19% of 138061 checklists1 pm: 19% of 127449 checklists2 pm: 19% of 121511 checklists3 pm: 18% of 107793 checklists4 pm: 18% of 82862 checklists5 pm: 19% of 57183 checklists6 pm: 18% of 39886 checklists7 pm: too few checklists (26969) to judge8 pm: too few checklists (12427) to judge9 pm: too few checklists (3658) to judge10 pm: too few checklists (1500) to judge11 pm: too few checklists (834) 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
January19%19%19%18%
February19%20%22%20%
March21%21%22%23%
April23%22%21%21%
May20%19%19%19%
June19%21%22%23%
July25%25%25%26%
August26%25%25%24%
September24%23%23%23%
October22%22%20%20%
November20%20%20%21%
December21%22%23%22%

Neighboring states

  • Oregon: year-round, peaks the second week of September
  • Idaho: year-round, peaks early March
  • Montana: winter visitor, peaks late February
  • California: year-round, peaks mid September

Common questions

When do Chestnut-backed Chickadees arrive in Washington?
The Chestnut-backed Chickadee is in Washington all year. It turns up on about 26% of checklists at its peak (early August) and on 19% in its quietest week (late January).
When do Chestnut-backed Chickadees leave Washington?
The Chestnut-backed Chickadee does not leave Washington: it is reported all year, from 19% of checklists in late January to 26% in early August.
When is the best time to see a Chestnut-backed Chickadee in Washington?
The Chestnut-backed Chickadee is reported most often in early August, on about 26% of Washington checklists.
Where in Washington are Chestnut-backed Chickadees seen most often?
By county, San Juan County, Mason County, and Skamania County have the highest peak reporting rates for the Chestnut-backed Chickadee (counties with at least 200 checklists).