WhenToBird

Bucephala islandica · Anatidae

When Do Barrow's Goldeneyes Arrive in Idaho?

Adult male Barrow's Goldeneye
Photo: Kevin Krebs, CC BY 4.0 via iNaturalist

Barrow's Goldeneyes are winter birds in Idaho: the first arrive in late October, they are common by early November, peak in late December (3.8% of checklists), and most are gone by the second week of April.

When to look

First arrivalsOct 22-31late October
Common byNov 1-7early November
PeakDec 22-31late December
Most gone byApr 8-14the second week of April

Best: late December. First arrivals late October; most are gone by the second week of April. Peak: on about 3.8% of Idaho checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marcommon
  4. Aprcommon
  5. Mayuncommon
  6. Junrare
  7. Julnot usually seen
  8. Augnot usually seen
  9. Seprare
  10. Octuncommon
  11. Novpeak season
  12. Decpeak season

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

0%2%4%6%Jan 1-7: 4.2% of 9357 checklistsJan 8-14: 3.2% of 6408 checklistsJan 15-21: 2.7% of 6358 checklistsJan 22-31: 3.4% of 8601 checklistsFeb 1-7: 2.8% of 5611 checklistsFeb 8-14: 2.4% of 6090 checklistsFeb 15-21: 2.6% of 7973 checklistsFeb 22-28: 2.9% of 5866 checklistsMar 1-7: 2.8% of 6144 checklistsMar 8-14: 2.6% of 6456 checklistsMar 15-21: 2.9% of 6786 checklistsMar 22-31: 2.7% of 9539 checklistsApr 1-7: 2.1% of 7202 checklistsApr 8-14: 1.7% of 7608 checklistsApr 15-21: 1.3% of 8069 checklistsApr 22-30: 1.0% of 10973 checklistsMay 1-7: 0.8% of 9481 checklistsMay 8-14: 0.7% of 11318 checklistsMay 15-21: 0.4% of 9141 checklistsMay 22-31: 0.4% of 13984 checklistsJun 1-7: 0.3% of 8897 checklistsJun 8-14: 0.2% of 8504 checklistsJun 15-21: 0.2% of 8078 checklistsJun 22-30: 0.2% of 9665 checklistsJul 1-7: 0.1% of 7144 checklistsJul 8-14: 0.1% of 6557 checklistsJul 15-21: 0.1% of 6430 checklistsJul 22-31: 0.1% of 8696 checklistsAug 1-7: 0.1% of 5896 checklistsAug 8-14: 0.1% of 5643 checklistsAug 15-21: 0.1% of 6151 checklistsAug 22-31: 0.1% of 7863 checklistsSep 1-7: 0.1% of 5769 checklistsSep 8-14: 0.1% of 5646 checklistsSep 15-21: 0.2% of 5460 checklistsSep 22-30: 0.3% of 6363 checklistsOct 1-7: 0.2% of 4980 checklistsOct 8-14: 0.1% of 5096 checklistsOct 15-21: 0.4% of 4878 checklistsOct 22-31: 1.4% of 6426 checklistsNov 1-7: 1.7% of 4822 checklistsNov 8-14: 2.7% of 4999 checklistsNov 15-21: 3.2% of 4601 checklistsNov 22-30: 2.6% of 6027 checklistsDec 1-7: 3.1% of 4180 checklistsDec 8-14: 2.7% of 4775 checklistsDec 15-21: 3.5% of 6522 checklistsDec 22-31: 3.4% of 7792 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 Idaho 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 Idaho

Best counties

Share of checklists at the peak
  1. Clearwater CountyBest the second week of December · 11 checklists that week, 1,909 in all43%
  2. Fremont CountyBest mid December · 18 checklists that week, 5,201 in all32%
  3. Bonneville CountyBest late March · 192 checklists that week, 6,998 in all26%
  4. Bingham CountyBest the second week of January · 10 checklists that week, 1,427 in all21%
  5. Power CountyBest mid March · 32 checklists that week, 2,278 in all19%
  6. Valley CountyBest mid November · 73 checklists that week, 8,991 in all17%

Best spots

Share of checklists at the peak
  1. Borden LakeOwyhee County, best late January · 33 checklists that week, 451 in all92%
  2. Salmon RiverLemhi County, best late March · 21 checklists that week, 206 in all91%
  3. Clearwater RiverNez Perce County, best mid February · 26 checklists that week, 513 in all68%
  4. Clearwater River (Hatwai)Nez Perce County, best mid December · 25 checklists that week, 192 in all49%

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

Best time of day

In Idaho, the Barrow's Goldeneye is most often listed on checklists started between 1 and 3 pm (2.1% of those checklists).

0%1%2%3%12 am: too few checklists (180) to judge1 am: too few checklists (176) to judge2 am: too few checklists (169) to judge3 am: too few checklists (164) to judge4 am: too few checklists (450) to judge5 am: too few checklists (2270) to judge6 am: 0.4% of 9122 checklists7 am: 0.9% of 22204 checklists8 am: 1.0% of 38672 checklists9 am: 1.4% of 38930 checklists10 am: 1.7% of 37338 checklists11 am: 1.8% of 33508 checklists12 pm: 1.9% of 28544 checklists1 pm: 2.1% of 25774 checklists2 pm: 2.0% of 24296 checklists3 pm: 1.7% of 21784 checklists4 pm: 1.4% of 19051 checklists5 pm: 0.9% of 14150 checklists6 pm: 0.6% of 10014 checklists7 pm: 0.3% of 7495 checklists8 pm: too few checklists (4352) to judge9 pm: too few checklists (1449) to judge10 pm: too few checklists (525) to judge11 pm: too few checklists (208) 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
January4.2%3.2%2.7%3.4%
February2.8%2.4%2.6%2.9%
March2.8%2.6%2.9%2.7%
April2.1%1.7%1.3%1.0%
May0.8%0.7%0.4%0.4%
June0.3%0.2%0.2%0.2%
July0.1%0.1%0.1%0.1%
August0.1%0.1%0.1%0.1%
September0.1%0.1%0.2%0.3%
October0.2%0.1%0.4%1.4%
November1.7%2.7%3.2%2.6%
December3.1%2.7%3.5%3.4%

Neighboring states

  • Montana: arrives the second week of October, 2 weeks earlier than Idaho
  • Utah: arrives the second week of November, 2 weeks later than Idaho
  • Oregon: arrives late October, in the same week than Idaho
  • Washington: arrives late October, in the same week than Idaho

Common questions

When do Barrow's Goldeneyes arrive in Idaho?
Barrow's Goldeneyes are winter birds in Idaho: the first arrive in late October, they are common by early November, peak in late December (3.8% of checklists), and most are gone by the second week of April.
When do Barrow's Goldeneyes leave Idaho?
Most Barrow's Goldeneyes have left Idaho 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 Barrow's Goldeneye in Idaho?
The Barrow's Goldeneye is reported most often in late December, on about 3.8% of Idaho checklists.
Where in Idaho are Barrow's Goldeneyes seen most often?
By county, Clearwater County, Fremont County, and Bonneville County have the highest peak reporting rates for the Barrow's Goldeneye (counties with at least 200 checklists).