WhenToBird

Fulica americana · Rallidae

When Do American Coots Arrive in Montana?

Adult American Coot
Photo: Daughter Dad, CC BY 4.0 via iNaturalist

American Coots reach Montana in the second week of March, are common by late March, peak in late April (22% of checklists), and most are gone by early December.

When to look

First arrivalsMar 8-14the second week of March
Common byMar 22-31late March
PeakApr 22-30late April
Most gone byDec 1-7early December

Best: late April. First arrivals the second week of March; most are gone by early December. Peak: on about 22% of Montana checklists.

  1. Januncommon
  2. Febrare
  3. Maruncommon
  4. Aprpeak season
  5. Maypeak season
  6. Jununcommon
  7. Juluncommon
  8. Augcommon
  9. Sepcommon
  10. Octpeak season
  11. Novpeak season
  12. Decuncommon

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

0%10%20%30%Jan 1-7: 4.1% of 7987 checklistsJan 8-14: 2.9% of 5561 checklistsJan 15-21: 2.5% of 5613 checklistsJan 22-31: 2.9% of 7881 checklistsFeb 1-7: 1.8% of 5018 checklistsFeb 8-14: 1.9% of 5598 checklistsFeb 15-21: 2.1% of 7247 checklistsFeb 22-28: 2.4% of 5531 checklistsMar 1-7: 3.1% of 6110 checklistsMar 8-14: 2.9% of 6623 checklistsMar 15-21: 4.7% of 7687 checklistsMar 22-31: 8.3% of 11095 checklistsApr 1-7: 14% of 7774 checklistsApr 8-14: 18% of 8785 checklistsApr 15-21: 23% of 9684 checklistsApr 22-30: 24% of 13805 checklistsMay 1-7: 19% of 11847 checklistsMay 8-14: 16% of 13547 checklistsMay 15-21: 12% of 13019 checklistsMay 22-31: 9.2% of 20456 checklistsJun 1-7: 7.6% of 12993 checklistsJun 8-14: 6.2% of 11594 checklistsJun 15-21: 5.9% of 11159 checklistsJun 22-30: 5.9% of 13786 checklistsJul 1-7: 5.0% of 9584 checklistsJul 8-14: 5.4% of 9078 checklistsJul 15-21: 5.4% of 7905 checklistsJul 22-31: 6.5% of 10906 checklistsAug 1-7: 6.9% of 7335 checklistsAug 8-14: 7.4% of 6868 checklistsAug 15-21: 9.2% of 6866 checklistsAug 22-31: 10% of 10076 checklistsSep 1-7: 11% of 7670 checklistsSep 8-14: 11% of 7490 checklistsSep 15-21: 14% of 6804 checklistsSep 22-30: 15% of 8016 checklistsOct 1-7: 16% of 5996 checklistsOct 8-14: 18% of 6156 checklistsOct 15-21: 20% of 5742 checklistsOct 22-31: 20% of 7790 checklistsNov 1-7: 21% of 5353 checklistsNov 8-14: 19% of 5475 checklistsNov 15-21: 14% of 4603 checklistsNov 22-30: 10% of 6067 checklistsDec 1-7: 7.6% of 4362 checklistsDec 8-14: 6.0% of 4467 checklistsDec 15-21: 5.1% of 5328 checklistsDec 22-31: 3.8% 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.

Embed this map on your site

Where in Montana

Best counties

Share of checklists at the peak
  1. Fallon CountyBest late September · 10 checklists that week, 542 in all58%
  2. Madison CountyBest late October · 109 checklists that week, 7,008 in all48%
  3. Pondera CountyBest early October · 18 checklists that week, 659 in all48%
  4. McCone CountyBest early January · 11 checklists that week, 537 in all47%
  5. Silver Bow CountyBest mid April · 100 checklists that week, 3,051 in all47%
  6. Deer Lodge CountyBest late April · 328 checklists that week, 8,732 in all45%

Best spots

Share of checklists at the peak
  1. Cattail Creek ParkGallatin County, best mid September · 25 checklists that week, 1,169 in all100%
  2. Upper Holter LakeLewis and Clark County, best early November · 31 checklists that week, 332 in all99%
  3. Kicking Horse ReservoirLake County, best the second week of October · 22 checklists that week, 661 in all98%
  4. Dailey LakePark County, best late October · 23 checklists that week, 262 in all96%

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

Best time of day

In Montana, the American Coot is most often listed on checklists started between 5 and 7 pm (12% of those checklists).

0%5%10%15%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: 8.5% of 12719 checklists7 am: 8.6% of 31202 checklists8 am: 9.0% of 47646 checklists9 am: 11% of 44624 checklists10 am: 11% of 40704 checklists11 am: 11% of 33825 checklists12 pm: 11% of 29407 checklists1 pm: 11% of 27959 checklists2 pm: 11% of 26928 checklists3 pm: 10% of 25313 checklists4 pm: 11% of 22151 checklists5 pm: 11% of 16884 checklists6 pm: 12% of 13780 checklists7 pm: 9.0% 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
January4.1%2.9%2.5%2.9%
February1.8%1.9%2.1%2.4%
March3.1%2.9%4.7%8.3%
April14%18%23%24%
May19%16%12%9.2%
June7.6%6.2%5.9%5.9%
July5.0%5.4%5.4%6.5%
August6.9%7.4%9.2%10%
September11%11%14%15%
October16%18%20%20%
November21%19%14%10%
December7.6%6.0%5.1%3.8%

Neighboring states

  • Idaho: arrives mid March, 1 week later than Montana
  • Wyoming: arrives early March, 1 week earlier than Montana
  • Utah: arrives mid October, 19 weeks earlier than Montana
  • Washington: year-round, peaks mid March

Common questions

When do American Coots arrive in Montana?
American Coots reach Montana in the second week of March, are common by late March, peak in late April (22% of checklists), and most are gone by early December.
When do American Coots leave Montana?
Most American Coots have left Montana by early December, when reports fall below half their usual rate. Stragglers are still reported until the second week of January.
When is the best time to see a American Coot in Montana?
The American Coot is reported most often in late April, on about 22% of Montana checklists.
Where in Montana are American Coots seen most often?
By county, Fallon County, Madison County, and Pondera County have the highest peak reporting rates for the American Coot (counties with at least 200 checklists).