WhenToBird

Cinclus mexicanus · Cinclidae

When Do American Dippers Arrive in Washington?

Adult American Dipper
Photo: Jared Shorma, CC BY 4.0 via iNaturalist

The American Dipper is in Washington all year. It turns up on about 1.1% of checklists at its peak (early October) and on 0.6% in its quietest week (mid April).

When to look

PresentAll year
Peak weekOct 1-7early October
Quietest weekApr 15-21mid April

Best: early October. Here all year. Peak: on about 1.1% of Washington checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marpeak season
  4. Aprcommon
  5. Maypeak season
  6. Junpeak season
  7. Julpeak season
  8. Augcommon
  9. Seppeak season
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

0%0.5%1%1.5%Jan 1-7: 1.0% of 41928 checklistsJan 8-14: 1.0% of 31152 checklistsJan 15-21: 1.0% of 31753 checklistsJan 22-31: 1.0% of 42530 checklistsFeb 1-7: 0.9% of 29739 checklistsFeb 8-14: 0.8% of 32746 checklistsFeb 15-21: 0.8% of 40328 checklistsFeb 22-28: 0.9% of 28432 checklistsMar 1-7: 0.8% of 30758 checklistsMar 8-14: 0.8% of 29368 checklistsMar 15-21: 0.8% of 32580 checklistsMar 22-31: 0.7% of 45614 checklistsApr 1-7: 0.7% of 33997 checklistsApr 8-14: 0.6% of 34729 checklistsApr 15-21: 0.6% of 38474 checklistsApr 22-30: 0.6% of 52185 checklistsMay 1-7: 0.7% of 44236 checklistsMay 8-14: 0.8% of 48708 checklistsMay 15-21: 1.0% of 41742 checklistsMay 22-31: 0.9% of 57082 checklistsJun 1-7: 0.8% of 39193 checklistsJun 8-14: 0.8% of 36042 checklistsJun 15-21: 0.9% of 34003 checklistsJun 22-30: 0.9% of 39711 checklistsJul 1-7: 0.8% of 31949 checklistsJul 8-14: 0.8% of 29086 checklistsJul 15-21: 0.6% of 28045 checklistsJul 22-31: 0.7% of 38275 checklistsAug 1-7: 0.7% of 28846 checklistsAug 8-14: 0.8% of 28036 checklistsAug 15-21: 0.7% of 27614 checklistsAug 22-31: 0.6% of 40356 checklistsSep 1-7: 0.8% of 31214 checklistsSep 8-14: 0.8% of 27795 checklistsSep 15-21: 1.0% of 29677 checklistsSep 22-30: 1.1% of 35241 checklistsOct 1-7: 1.1% of 28605 checklistsOct 8-14: 1.1% of 28655 checklistsOct 15-21: 1.0% of 24643 checklistsOct 22-31: 1.0% of 34874 checklistsNov 1-7: 0.9% of 25658 checklistsNov 8-14: 1.1% of 25700 checklistsNov 15-21: 1.0% of 24331 checklistsNov 22-30: 1.0% of 32784 checklistsDec 1-7: 1.0% of 24099 checklistsDec 8-14: 0.9% of 23339 checklistsDec 15-21: 1.1% of 27666 checklistsDec 22-31: 0.9% 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.

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Where in Washington

Best counties

Share of checklists at the peak
  1. Skamania CountyBest late November · 177 checklists that week, 10,140 in all16%
  2. Wahkiakum CountyBest late March · 169 checklists that week, 5,618 in all13%
  3. Pend Oreille CountyBest the second week of November · 56 checklists that week, 3,664 in all9.2%
  4. Chelan CountyBest mid December · 750 checklists that week, 45,099 in all8.1%
  5. Columbia CountyBest the second week of February · 16 checklists that week, 1,894 in all7.4%
  6. Okanogan CountyBest late December · 461 checklists that week, 23,048 in all6.4%

Best spots

Share of checklists at the peak
  1. Carter PondKitsap County, best early January · 25 checklists that week, 195 in all78%
  2. Tumwater Falls ParkThurston County, best early January · 21 checklists that week, 598 in all78%
  3. Leavenworth National Fish HatcheryChelan County, best late December · 25 checklists that week, 1,533 in all70%
  4. Riverfront ParkSpokane County, best late December · 21 checklists that week, 752 in all61%
  5. Teanaway RiverKittitas County, best the second week of May · 24 checklists that week, 259 in all56%
  6. Railroad Bridge ParkClallam County, best late November · 33 checklists that week, 1,941 in all49%

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

Best time of day

In Washington, the American Dipper is most often listed on checklists started between 1 and 3 pm (1.0% of those checklists).

0%0.5%1%1.5%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: 0.7% of 56744 checklists7 am: 0.7% of 133294 checklists8 am: 1.0% of 184196 checklists9 am: 0.8% of 186303 checklists10 am: 0.9% of 177063 checklists11 am: 1.0% of 154936 checklists12 pm: 0.9% of 138061 checklists1 pm: 1.0% of 127449 checklists2 pm: 0.9% of 121511 checklists3 pm: 0.8% of 107793 checklists4 pm: 0.7% of 82862 checklists5 pm: 0.6% of 57183 checklists6 pm: 0.5% 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
January1.0%1.0%1.0%1.0%
February0.9%0.8%0.8%0.9%
March0.8%0.8%0.8%0.7%
April0.7%0.6%0.6%0.6%
May0.7%0.8%1.0%0.9%
June0.8%0.8%0.9%0.9%
July0.8%0.8%0.6%0.7%
August0.7%0.8%0.7%0.6%
September0.8%0.8%1.0%1.1%
October1.1%1.1%1.0%1.0%
November0.9%1.1%1.0%1.0%
December1.0%0.9%1.1%0.9%

Neighboring states

  • Oregon: year-round, peaks early July
  • Idaho: winter visitor, peaks late January
  • Montana: year-round, peaks the second week of July
  • Utah: year-round, peaks late June

Common questions

When do American Dippers arrive in Washington?
The American Dipper is in Washington all year. It turns up on about 1.1% of checklists at its peak (early October) and on 0.6% in its quietest week (mid April).
When do American Dippers leave Washington?
The American Dipper does not leave Washington: it is reported all year, from 0.6% of checklists in mid April to 1.1% in early October.
When is the best time to see a American Dipper in Washington?
The American Dipper is reported most often in early October, on about 1.1% of Washington checklists.
Where in Washington are American Dippers seen most often?
By county, Skamania County, Wahkiakum County, and Pend Oreille County have the highest peak reporting rates for the American Dipper (counties with at least 200 checklists).