WhenToBird

Mareca strepera · Anatidae

When Do Gadwalls Arrive in Alaska?

Adult Gadwall
Photo: Anne Parsons, CC0 1.0 via iNaturalist

Gadwalls reach Alaska in mid December, are common by late January, peak in mid April (9.5% of checklists), and most are gone by early July.

When to look

First arrivalsDec 15-21mid December
Common byJan 22-31late January
PeakApr 15-21mid April
Most gone byJul 1-7early July

Best: mid April. First arrivals mid December; most are gone by early July. Peak: on about 9.5% of Alaska checklists.

  1. Januncommon
  2. Febuncommon
  3. Marcommon
  4. Aprpeak season
  5. Maypeak season
  6. Juncommon
  7. Juluncommon
  8. Auguncommon
  9. Sepuncommon
  10. Octcommon
  11. Novuncommon
  12. Decuncommon

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

0%5%10%15%Jan 1-7: 1.7% of 3788 checklistsJan 8-14: 2.0% of 2852 checklistsJan 15-21: 2.1% of 2810 checklistsJan 22-31: 2.6% of 3629 checklistsFeb 1-7: 2.8% of 2519 checklistsFeb 8-14: 2.4% of 2927 checklistsFeb 15-21: 2.0% of 3743 checklistsFeb 22-28: 2.0% of 2846 checklistsMar 1-7: 1.4% of 2904 checklistsMar 8-14: 2.6% of 3073 checklistsMar 15-21: 2.4% of 3359 checklistsMar 22-31: 4.9% of 5855 checklistsApr 1-7: 7.0% of 4329 checklistsApr 8-14: 8.7% of 4949 checklistsApr 15-21: 9.2% of 7114 checklistsApr 22-30: 10% of 10916 checklistsMay 1-7: 8.8% of 11827 checklistsMay 8-14: 7.6% of 14115 checklistsMay 15-21: 7.4% of 12152 checklistsMay 22-31: 6.2% of 19919 checklistsJun 1-7: 4.8% of 15816 checklistsJun 8-14: 3.7% of 17194 checklistsJun 15-21: 3.0% of 15943 checklistsJun 22-30: 3.4% of 16192 checklistsJul 1-7: 1.8% of 9815 checklistsJul 8-14: 1.7% of 8263 checklistsJul 15-21: 1.6% of 7081 checklistsJul 22-31: 1.7% of 9434 checklistsAug 1-7: 1.9% of 6380 checklistsAug 8-14: 1.8% of 6258 checklistsAug 15-21: 1.9% of 6114 checklistsAug 22-31: 2.3% of 8189 checklistsSep 1-7: 2.6% of 5848 checklistsSep 8-14: 3.0% of 4853 checklistsSep 15-21: 2.7% of 4415 checklistsSep 22-30: 2.9% of 5086 checklistsOct 1-7: 4.1% of 3576 checklistsOct 8-14: 3.5% of 4212 checklistsOct 15-21: 4.1% of 3339 checklistsOct 22-31: 3.4% of 4169 checklistsNov 1-7: 3.2% of 2844 checklistsNov 8-14: 2.5% of 2753 checklistsNov 15-21: 2.0% of 2291 checklistsNov 22-30: 2.0% of 3066 checklistsDec 1-7: 1.7% of 2199 checklistsDec 8-14: 1.6% of 2472 checklistsDec 15-21: 1.9% of 3071 checklistsDec 22-31: 2.6% 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. Kodiak Island BoroughBest late April · 413 checklists that week, 11,483 in all28%
  2. Anchorage MunicipalityBest late April · 2742 checklists that week, 65,703 in all23%
  3. Hoonah-Angoon Census AreaBest mid February · 90 checklists that week, 8,159 in all22%
  4. Kenai Peninsula BoroughBest mid April · 1245 checklists that week, 49,772 in all12%
  5. Chugach Census AreaBest mid February · 57 checklists that week, 7,540 in all8.8%
  6. Lake and Peninsula BoroughBest mid May · 16 checklists that week, 1,172 in all8.5%

Best spots

Share of checklists at the peak
  1. Chester Creek Greenbelt (Westchester Lake)Anchorage Municipality, best late September · 23 checklists that week, 2,640 in all83%
  2. Lake OrbinKodiak Island Borough, best mid April · 31 checklists that week, 432 in all79%
  3. Kalsin PondKodiak Island Borough, best early April · 20 checklists that week, 798 in all78%
  4. Potter Marsh (south)Anchorage Municipality, best the second week of May · 40 checklists that week, 664 in all69%
  5. Potter Marsh (south 3)Anchorage Municipality, best early May · 47 checklists that week, 337 in all63%

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

Best time of day

In Alaska, the Gadwall is most often listed on checklists started between 7 and 9 pm (5.9% of those checklists).

0%2%4%6%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: 4.2% of 9751 checklists7 am: 4.6% of 17236 checklists8 am: 4.5% of 24936 checklists9 am: 4.1% of 30139 checklists10 am: 3.9% of 30866 checklists11 am: 3.8% of 28207 checklists12 pm: 3.7% of 25650 checklists1 pm: 3.7% of 24144 checklists2 pm: 3.7% of 23323 checklists3 pm: 3.8% of 20763 checklists4 pm: 4.4% of 18245 checklists5 pm: 5.1% of 14895 checklists6 pm: 5.8% of 11707 checklists7 pm: 5.9% of 9365 checklists8 pm: 5.8% 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
January1.7%2.0%2.1%2.6%
February2.8%2.4%2.0%2.0%
March1.4%2.6%2.4%4.9%
April7.0%8.7%9.2%10%
May8.8%7.6%7.4%6.2%
June4.8%3.7%3.0%3.4%
July1.8%1.7%1.6%1.7%
August1.9%1.8%1.9%2.3%
September2.6%3.0%2.7%2.9%
October4.1%3.5%4.1%3.4%
November3.2%2.5%2.0%2.0%
December1.7%1.6%1.9%2.6%

Neighboring states

  • Washington: year-round, peaks late April
  • Oregon: arrives mid December, in the same week than Alaska
  • Idaho: year-round, peaks mid April
  • Montana: arrives late February, 9 weeks later than Alaska

Common questions

When do Gadwalls arrive in Alaska?
Gadwalls reach Alaska in mid December, are common by late January, peak in mid April (9.5% of checklists), and most are gone by early July.
When do Gadwalls leave Alaska?
Most Gadwalls have left Alaska by early July, when reports fall below half their usual rate.
When is the best time to see a Gadwall in Alaska?
The Gadwall is reported most often in mid April, on about 9.5% of Alaska checklists.
Where in Alaska are Gadwalls seen most often?
By county, Kodiak Island Borough, Anchorage Municipality, and Hoonah-Angoon Census Area have the highest peak reporting rates for the Gadwall (counties with at least 200 checklists).