WhenToBird

Cinclus mexicanus · Cinclidae

When Do American Dippers Arrive in Alaska?

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

American Dippers are winter birds in Alaska: the first arrive in mid September, they are common by early October, peak in mid December (4.4% of checklists), and most are gone by the second week of April.

When to look

First arrivalsSep 15-21mid September
Common byOct 1-7early October
PeakDec 15-21mid December
Most gone byApr 8-14the second week of April

Best: mid December. First arrivals mid September; most are gone by the second week of April. Peak: on about 4.4% of Alaska checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marcommon
  4. Aprcommon
  5. Mayuncommon
  6. Jununcommon
  7. Juluncommon
  8. Auguncommon
  9. Sepuncommon
  10. Octcommon
  11. Novpeak season
  12. Decpeak season

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

0%2%4%6%Jan 1-7: 4.5% of 3788 checklistsJan 8-14: 3.6% of 2852 checklistsJan 15-21: 3.2% of 2810 checklistsJan 22-31: 3.2% of 3629 checklistsFeb 1-7: 3.3% of 2519 checklistsFeb 8-14: 3.7% of 2927 checklistsFeb 15-21: 3.3% of 3743 checklistsFeb 22-28: 3.8% of 2846 checklistsMar 1-7: 2.5% of 2904 checklistsMar 8-14: 3.4% of 3073 checklistsMar 15-21: 3.4% of 3359 checklistsMar 22-31: 2.8% of 5855 checklistsApr 1-7: 2.2% of 4329 checklistsApr 8-14: 1.6% of 4949 checklistsApr 15-21: 1.3% of 7114 checklistsApr 22-30: 1.0% of 10916 checklistsMay 1-7: 0.8% of 11827 checklistsMay 8-14: 0.8% of 14115 checklistsMay 15-21: 1.2% of 12152 checklistsMay 22-31: 1.4% of 19919 checklistsJun 1-7: 1.5% of 15816 checklistsJun 8-14: 1.5% of 17194 checklistsJun 15-21: 1.5% of 15943 checklistsJun 22-30: 1.5% of 16192 checklistsJul 1-7: 1.4% of 9815 checklistsJul 8-14: 1.1% of 8263 checklistsJul 15-21: 1.1% of 7081 checklistsJul 22-31: 1.0% of 9434 checklistsAug 1-7: 1.1% of 6380 checklistsAug 8-14: 0.9% of 6258 checklistsAug 15-21: 0.8% of 6114 checklistsAug 22-31: 0.6% of 8189 checklistsSep 1-7: 0.8% of 5848 checklistsSep 8-14: 1.0% of 4853 checklistsSep 15-21: 0.8% of 4415 checklistsSep 22-30: 1.6% of 5086 checklistsOct 1-7: 1.8% of 3576 checklistsOct 8-14: 1.9% of 4212 checklistsOct 15-21: 2.3% of 3339 checklistsOct 22-31: 3.6% of 4169 checklistsNov 1-7: 4.1% of 2844 checklistsNov 8-14: 4.8% of 2753 checklistsNov 15-21: 4.1% of 2291 checklistsNov 22-30: 4.0% of 3066 checklistsDec 1-7: 3.3% of 2199 checklistsDec 8-14: 4.7% of 2472 checklistsDec 15-21: 4.4% of 3071 checklistsDec 22-31: 4.3% of 3442 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 Alaska 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 Alaska

Best counties

Share of checklists at the peak
  1. Nome Census AreaBest mid February · 43 checklists that week, 13,472 in all29%
  2. Skagway MunicipalityBest mid December · 14 checklists that week, 2,045 in all29%
  3. Haines BoroughBest the second week of November · 61 checklists that week, 1,690 in all26%
  4. Ketchikan Gateway BoroughBest mid December · 31 checklists that week, 4,641 in all21%
  5. Aleutians East BoroughBest mid February · 19 checklists that week, 1,634 in all12%
  6. Kodiak Island BoroughBest mid November · 176 checklists that week, 11,483 in all9.0%

Best spots

Share of checklists at the peak
  1. Willow CreekNome Census Area, best the second week of June · 38 checklists that week, 147 in all66%
  2. Salmon Run ParkAnchorage Municipality, best the second week of June · 25 checklists that week, 262 in all50%
  3. Radenbough Cove (Ketchikan)Ketchikan Gateway Borough, best the second week of May · 21 checklists that week, 266 in all40%
  4. Entrance PointJuneau City and Borough, best late March · 24 checklists that week, 486 in all40%
  5. State Land Disposals - Municipal PurposesAnchorage Municipality, best mid May · 34 checklists that week, 265 in all36%
  6. Genivieve LakeKodiak Island Borough, best early January · 23 checklists that week, 516 in all33%

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

Best time of day

In Alaska, the American Dipper is most often listed on checklists started between 12 and 2 pm (2.5% of those checklists).

0%1%2%3%12 am: too few checklists (549) to judge1 am: too few checklists (365) to judge2 am: too few checklists (291) to judge3 am: too few checklists (624) to judge4 am: too few checklists (1241) to judge5 am: too few checklists (3532) to judge6 am: 1.4% of 9751 checklists7 am: 1.1% of 17236 checklists8 am: 1.4% of 24936 checklists9 am: 1.8% of 30139 checklists10 am: 2.1% of 30866 checklists11 am: 2.2% of 28207 checklists12 pm: 2.6% of 25650 checklists1 pm: 2.4% of 24144 checklists2 pm: 2.2% of 23323 checklists3 pm: 2.1% of 20763 checklists4 pm: 1.5% of 18245 checklists5 pm: 1.3% of 14895 checklists6 pm: 1.2% of 11707 checklists7 pm: 1.0% of 9365 checklists8 pm: 0.6% of 6934 checklists9 pm: too few checklists (4176) to judge10 pm: too few checklists (2050) to judge11 pm: too few checklists (952) 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
January4.5%3.6%3.2%3.2%
February3.3%3.7%3.3%3.8%
March2.5%3.4%3.4%2.8%
April2.2%1.6%1.3%1.0%
May0.8%0.8%1.2%1.4%
June1.5%1.5%1.5%1.5%
July1.4%1.1%1.1%1.0%
August1.1%0.9%0.8%0.6%
September0.8%1.0%0.8%1.6%
October1.8%1.9%2.3%3.6%
November4.1%4.8%4.1%4.0%
December3.3%4.7%4.4%4.3%

Neighboring states

  • Washington: year-round, peaks early October
  • Oregon: year-round, peaks early July
  • Idaho: arrives early May, 18 weeks earlier than Alaska
  • Montana: year-round, peaks the second week of July

Common questions

When do American Dippers arrive in Alaska?
American Dippers are winter birds in Alaska: the first arrive in mid September, they are common by early October, peak in mid December (4.4% of checklists), and most are gone by the second week of April.
When do American Dippers leave Alaska?
Most American Dippers have left Alaska by the second week of April, when reports fall below half their usual rate. Stragglers are still reported until late April.
When is the best time to see a American Dipper in Alaska?
The American Dipper is reported most often in mid December, on about 4.4% of Alaska checklists.
Where in Alaska are American Dippers seen most often?
By county, Nome Census Area, Skagway Municipality, and Haines Borough have the highest peak reporting rates for the American Dipper (counties with at least 200 checklists).