WhenToBird

Zonotrichia albicollis · Passerellidae

When Do White-throated Sparrows Arrive in Idaho?

Adult White-throated Sparrow
Photo: northerly, CC BY 4.0 via iNaturalist

White-throated Sparrows are winter birds in Idaho: they arrive in mid September, peak in the second week of October (1.2% of checklists), and most are gone by mid February.

When to look

First arrivalsSep 15-21mid September
Common bySep 15-21mid September
PeakOct 8-14the second week of October
Most gone byFeb 15-21mid February

Best: the second week of October. First arrivals mid September; most are gone by mid February. Peak: on about 1.2% of Idaho checklists.

  1. Janpeak season
  2. Febcommon
  3. Maruncommon
  4. Apruncommon
  5. Mayrare
  6. Junnot usually seen
  7. Julnot usually seen
  8. Augnot usually seen
  9. Sepcommon
  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: 1.3% of 9357 checklistsJan 8-14: 1.1% of 6408 checklistsJan 15-21: 0.8% of 6358 checklistsJan 22-31: 0.9% of 8601 checklistsFeb 1-7: 0.7% of 5611 checklistsFeb 8-14: 0.5% of 6090 checklistsFeb 15-21: 0.5% of 7973 checklistsFeb 22-28: 0.5% of 5866 checklistsMar 1-7: 0.3% of 6144 checklistsMar 8-14: 0.2% of 6456 checklistsMar 15-21: 0.2% of 6786 checklistsMar 22-31: 0.3% of 9539 checklistsApr 1-7: 0.1% of 7202 checklistsApr 8-14: 0.2% of 7608 checklistsApr 15-21: 0.2% of 8069 checklistsApr 22-30: 0.1% of 10973 checklistsMay 1-7: 0.1% of 9481 checklistsMay 8-14: 0.1% of 11318 checklistsMay 15-21: 0.1% of 9141 checklistsMay 22-31: 0.1% of 13984 checklistsJun 1-7: 0% of 8897 checklistsJun 8-14: 0% of 8504 checklistsJun 15-21: 0% of 8078 checklistsJun 22-30: 0% of 9665 checklistsJul 1-7: 0% of 7144 checklistsJul 8-14: 0% of 6557 checklistsJul 15-21: 0.1% of 6430 checklistsJul 22-31: 0% of 8696 checklistsAug 1-7: 0% of 5896 checklistsAug 8-14: 0% of 5643 checklistsAug 15-21: 0% of 6151 checklistsAug 22-31: 0% of 7863 checklistsSep 1-7: 0.1% of 5769 checklistsSep 8-14: 0.2% of 5646 checklistsSep 15-21: 0.5% of 5460 checklistsSep 22-30: 0.8% of 6363 checklistsOct 1-7: 1.3% of 4980 checklistsOct 8-14: 1.2% of 5096 checklistsOct 15-21: 1.0% of 4878 checklistsOct 22-31: 0.7% of 6426 checklistsNov 1-7: 0.8% of 4822 checklistsNov 8-14: 0.8% of 4999 checklistsNov 15-21: 1.3% of 4601 checklistsNov 22-30: 0.9% of 6027 checklistsDec 1-7: 0.9% of 4180 checklistsDec 8-14: 0.9% of 4775 checklistsDec 15-21: 0.9% of 6522 checklistsDec 22-31: 1.0% 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. Power CountyBest late February · 19 checklists that week, 2,278 in all8.9%
  2. Jefferson CountyBest the second week of October · 57 checklists that week, 5,319 in all7.5%
  3. Lemhi CountyBest late December · 78 checklists that week, 6,242 in all7.0%
  4. Adams CountyBest mid October · 96 checklists that week, 5,826 in all6.0%
  5. Shoshone CountyBest mid February · 49 checklists that week, 2,886 in all4.8%
  6. Nez Perce CountyBest late November · 327 checklists that week, 10,708 in all4.2%

Best spots

Share of checklists at the peak
  1. Kathryn Albertson ParkAda County, best late December · 168 checklists that week, 3,927 in all17%
  2. Tammany CreekNez Perce County, best the second week of January · 23 checklists that week, 546 in all16%
  3. Hulls Gulch ReserveAda County, best late December · 60 checklists that week, 2,292 in all14%
  4. Lydle GulchAda County, best mid October · 21 checklists that week, 1,368 in all11%

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

Best time of day

In Idaho, the White-throated Sparrow is most often listed on checklists started between 8 and 10 am (0.6% of those checklists).

0%0.5%1%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: 0.2% of 9122 checklists7 am: 0.3% of 22204 checklists8 am: 0.6% of 38672 checklists9 am: 0.6% of 38930 checklists10 am: 0.5% of 37338 checklists11 am: 0.5% of 33508 checklists12 pm: 0.4% of 28544 checklists1 pm: 0.3% of 25774 checklists2 pm: 0.3% of 24296 checklists3 pm: 0.3% of 21784 checklists4 pm: 0.2% of 19051 checklists5 pm: 0.1% of 14150 checklists6 pm: 0.1% of 10014 checklists7 pm: 0.1% 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
January1.3%1.1%0.8%0.9%
February0.7%0.5%0.5%0.5%
March0.3%0.2%0.2%0.3%
April0.1%0.2%0.2%0.1%
May0.1%0.1%0.1%0.1%
June0%0%0%0%
July0%0%0.1%0%
August0%0%0%0%
September0.1%0.2%0.5%0.8%
October1.3%1.2%1.0%0.7%
November0.8%0.8%1.3%0.9%
December0.9%0.9%0.9%1.0%

Neighboring states

  • Montana: arrives early September, 2 weeks earlier than Idaho
  • Utah: arrives late September, 1 week later than Idaho
  • Oregon: arrives early October, 2 weeks later than Idaho
  • Washington: arrives mid September, in the same week than Idaho

Common questions

When do White-throated Sparrows arrive in Idaho?
White-throated Sparrows are winter birds in Idaho: they arrive in mid September, peak in the second week of October (1.2% of checklists), and most are gone by mid February.
When do White-throated Sparrows leave Idaho?
Most White-throated Sparrows have left Idaho by mid February, when reports fall below half their usual rate.
When is the best time to see a White-throated Sparrow in Idaho?
The White-throated Sparrow is reported most often in the second week of October, on about 1.2% of Idaho checklists.
Where in Idaho are White-throated Sparrows seen most often?
By county, Power County, Jefferson County, and Lemhi County have the highest peak reporting rates for the White-throated Sparrow (counties with at least 200 checklists).