WhenToBird

Passer domesticus · Passeridae

When Do House Sparrows Arrive in Montana?

Adult male House Sparrow
Photo: Esteban Poveda, CC BY 4.0 via iNaturalist

The House Sparrow is in Montana all year. It turns up on about 25% of checklists at its peak (mid February) and on 15% in its quietest week (mid September).

When to look

PresentAll year
Peak weekFeb 15-21mid February
Quietest weekSep 15-21mid September

Best: mid February. Here all year. Peak: on about 25% of Montana checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marpeak season
  4. Aprpeak season
  5. Maypeak season
  6. Juncommon
  7. Julpeak season
  8. Augpeak season
  9. Sepcommon
  10. Octcommon
  11. Novpeak season
  12. Decpeak season

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

0%10%20%30%Jan 1-7: 24% of 7987 checklistsJan 8-14: 23% of 5561 checklistsJan 15-21: 22% of 5613 checklistsJan 22-31: 22% of 7881 checklistsFeb 1-7: 24% of 5018 checklistsFeb 8-14: 26% of 5598 checklistsFeb 15-21: 25% of 7247 checklistsFeb 22-28: 24% of 5531 checklistsMar 1-7: 25% of 6110 checklistsMar 8-14: 24% of 6623 checklistsMar 15-21: 23% of 7687 checklistsMar 22-31: 20% of 11095 checklistsApr 1-7: 21% of 7774 checklistsApr 8-14: 20% of 8785 checklistsApr 15-21: 18% of 9684 checklistsApr 22-30: 20% of 13805 checklistsMay 1-7: 20% of 11847 checklistsMay 8-14: 20% of 13547 checklistsMay 15-21: 21% of 13019 checklistsMay 22-31: 20% of 20456 checklistsJun 1-7: 18% of 12993 checklistsJun 8-14: 16% of 11594 checklistsJun 15-21: 16% of 11159 checklistsJun 22-30: 15% of 13786 checklistsJul 1-7: 16% of 9584 checklistsJul 8-14: 16% of 9078 checklistsJul 15-21: 18% of 7905 checklistsJul 22-31: 19% of 10906 checklistsAug 1-7: 20% of 7335 checklistsAug 8-14: 18% of 6868 checklistsAug 15-21: 19% of 6866 checklistsAug 22-31: 18% of 10076 checklistsSep 1-7: 16% of 7670 checklistsSep 8-14: 15% of 7490 checklistsSep 15-21: 15% of 6804 checklistsSep 22-30: 15% of 8016 checklistsOct 1-7: 16% of 5996 checklistsOct 8-14: 17% of 6156 checklistsOct 15-21: 16% of 5742 checklistsOct 22-31: 18% of 7790 checklistsNov 1-7: 19% of 5353 checklistsNov 8-14: 19% of 5475 checklistsNov 15-21: 21% of 4603 checklistsNov 22-30: 20% of 6067 checklistsDec 1-7: 22% of 4362 checklistsDec 8-14: 23% of 4467 checklistsDec 15-21: 24% of 5328 checklistsDec 22-31: 23% of 6672 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 Montana 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 Montana

Best counties

Share of checklists at the peak
  1. Liberty CountyBest the second week of August · 19 checklists that week, 800 in all80%
  2. Valley CountyBest the second week of February · 12 checklists that week, 3,392 in all72%
  3. Fallon CountyBest the second week of September · 15 checklists that week, 542 in all58%
  4. Daniels CountyBest the second week of May · 24 checklists that week, 481 in all55%
  5. Glacier CountyBest early March · 40 checklists that week, 9,238 in all53%
  6. Fergus CountyBest early March · 63 checklists that week, 4,948 in all52%

Best spots

Share of checklists at the peak
  1. Pattee CreekMissoula County, best early March · 25 checklists that week, 1,423 in all93%
  2. Onstad ParkSheridan County, best late May · 56 checklists that week, 132 in all89%
  3. Lake BakerFallon County, best late May · 20 checklists that week, 266 in all88%
  4. Onstad Park (Westby)Sheridan County, best late May · 45 checklists that week, 123 in all88%
  5. West Bank ParkCascade County, best late May · 20 checklists that week, 691 in all87%
  6. Grizzly StatueMissoula County, best late March · 28 checklists that week, 704 in all79%

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

Best time of day

In Montana, the House Sparrow is most often listed on checklists started between 7 and 9 am (25% of those checklists).

0%10%20%30%12 am: too few checklists (183) to judge1 am: too few checklists (169) to judge2 am: too few checklists (163) to judge3 am: too few checklists (212) to judge4 am: too few checklists (503) to judge5 am: too few checklists (4022) to judge6 am: 23% of 12719 checklists7 am: 25% of 31202 checklists8 am: 25% of 47646 checklists9 am: 23% of 44624 checklists10 am: 20% of 40704 checklists11 am: 18% of 33825 checklists12 pm: 17% of 29407 checklists1 pm: 16% of 27959 checklists2 pm: 16% of 26928 checklists3 pm: 16% of 25313 checklists4 pm: 16% of 22151 checklists5 pm: 16% of 16884 checklists6 pm: 19% of 13780 checklists7 pm: 15% of 9926 checklists8 pm: too few checklists (5765) to judge9 pm: too few checklists (2099) to judge10 pm: too few checklists (595) to judge11 pm: too few checklists (230) 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
January24%23%22%22%
February24%26%25%24%
March25%24%23%20%
April21%20%18%20%
May20%20%21%20%
June18%16%16%15%
July16%16%18%19%
August20%18%19%18%
September16%15%15%15%
October16%17%16%18%
November19%19%21%20%
December22%23%24%23%

Neighboring states

  • Idaho: year-round, peaks mid February
  • Wyoming: all year, most in winter, peaks mid February
  • Utah: year-round, peaks mid February
  • Washington: year-round, peaks the second week of July

Common questions

When do House Sparrows arrive in Montana?
The House Sparrow is in Montana all year. It turns up on about 25% of checklists at its peak (mid February) and on 15% in its quietest week (mid September).
When do House Sparrows leave Montana?
The House Sparrow does not leave Montana: it is reported all year, from 15% of checklists in mid September to 25% in mid February.
When is the best time to see a House Sparrow in Montana?
The House Sparrow is reported most often in mid February, on about 25% of Montana checklists.
Where in Montana are House Sparrows seen most often?
By county, Liberty County, Valley County, and Fallon County have the highest peak reporting rates for the House Sparrow (counties with at least 200 checklists).