WhenToBird

Podilymbus podiceps · Podicipedidae

When Do Pied-billed Grebes Arrive in Montana?

Adult Pied-billed Grebe
Photo: Rodrigo Paiva Lázaro, CC BY 4.0 via iNaturalist

Pied-billed Grebes are winter birds in Montana: the first arrive in early April, they are common by the second week of April, peak in late October (8.7% of checklists), and most are gone by late November.

When to look

First arrivalsApr 1-7early April
Common byApr 8-14the second week of April
PeakOct 22-31late October
Most gone byNov 22-30late November

Best: late October. First arrivals early April; most are gone by late November. Peak: on about 8.7% of Montana checklists.

  1. Janrare
  2. Febnot usually seen
  3. Marrare
  4. Apruncommon
  5. Mayuncommon
  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%5%10%Jan 1-7: 0.7% of 7987 checklistsJan 8-14: 0.6% of 5561 checklistsJan 15-21: 0.4% of 5613 checklistsJan 22-31: 0.4% of 7881 checklistsFeb 1-7: 0.2% of 5018 checklistsFeb 8-14: 0.2% of 5598 checklistsFeb 15-21: 0.3% of 7247 checklistsFeb 22-28: 0.1% of 5531 checklistsMar 1-7: 0.4% of 6110 checklistsMar 8-14: 0.5% of 6623 checklistsMar 15-21: 0.6% of 7687 checklistsMar 22-31: 0.7% of 11095 checklistsApr 1-7: 0.9% of 7774 checklistsApr 8-14: 1.8% of 8785 checklistsApr 15-21: 2.3% of 9684 checklistsApr 22-30: 3.0% of 13805 checklistsMay 1-7: 2.9% of 11847 checklistsMay 8-14: 3.1% of 13547 checklistsMay 15-21: 2.3% of 13019 checklistsMay 22-31: 2.0% of 20456 checklistsJun 1-7: 1.9% of 12993 checklistsJun 8-14: 1.5% of 11594 checklistsJun 15-21: 1.7% of 11159 checklistsJun 22-30: 1.6% of 13786 checklistsJul 1-7: 1.7% of 9584 checklistsJul 8-14: 1.8% of 9078 checklistsJul 15-21: 2.0% of 7905 checklistsJul 22-31: 2.9% of 10906 checklistsAug 1-7: 3.4% of 7335 checklistsAug 8-14: 3.5% of 6868 checklistsAug 15-21: 4.0% of 6866 checklistsAug 22-31: 4.2% of 10076 checklistsSep 1-7: 3.7% of 7670 checklistsSep 8-14: 4.5% of 7490 checklistsSep 15-21: 5.5% of 6804 checklistsSep 22-30: 6.0% of 8016 checklistsOct 1-7: 7.0% of 5996 checklistsOct 8-14: 8.1% of 6156 checklistsOct 15-21: 8.7% of 5742 checklistsOct 22-31: 9.2% of 7790 checklistsNov 1-7: 8.1% of 5353 checklistsNov 8-14: 6.0% of 5475 checklistsNov 15-21: 3.4% of 4603 checklistsNov 22-30: 2.1% of 6067 checklistsDec 1-7: 1.0% of 4362 checklistsDec 8-14: 1.3% of 4467 checklistsDec 15-21: 0.5% of 5328 checklistsDec 22-31: 0.5% 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. Fallon CountyBest late September · 10 checklists that week, 542 in all58%
  2. Rosebud CountyBest early October · 11 checklists that week, 795 in all32%
  3. Pondera CountyBest late October · 11 checklists that week, 659 in all25%
  4. Wheatland CountyBest mid October · 10 checklists that week, 1,384 in all22%
  5. Daniels CountyBest late July · 12 checklists that week, 481 in all21%
  6. Big Horn CountyBest the second week of November · 18 checklists that week, 1,279 in all21%

Best spots

Share of checklists at the peak
  1. Dailey LakePark County, best late October · 23 checklists that week, 262 in all83%
  2. Cattail Creek ParkGallatin County, best the second week of November · 62 checklists that week, 1,169 in all71%
  3. East Gallatin Recreation AreaGallatin County, best late October · 104 checklists that week, 1,671 in all67%
  4. Lee Metcalf National Wildlife RefugeRavalli County, best mid September · 24 checklists that week, 1,477 in all60%
  5. Browns LakePowell County, best mid October · 21 checklists that week, 433 in all59%

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

Best time of day

In Montana, the Pied-billed Grebe is most often listed on checklists started between 4 and 6 pm (3.2% of those checklists).

0%1%2%3%4%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: 1.9% of 12719 checklists7 am: 2.1% of 31202 checklists8 am: 2.5% of 47646 checklists9 am: 2.8% of 44624 checklists10 am: 2.8% of 40704 checklists11 am: 2.7% of 33825 checklists12 pm: 2.5% of 29407 checklists1 pm: 2.6% of 27959 checklists2 pm: 2.7% of 26928 checklists3 pm: 2.8% of 25313 checklists4 pm: 3.2% of 22151 checklists5 pm: 3.2% of 16884 checklists6 pm: 2.9% of 13780 checklists7 pm: 2.1% 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
January0.7%0.6%0.4%0.4%
February0.2%0.2%0.3%0.1%
March0.4%0.5%0.6%0.7%
April0.9%1.8%2.3%3.0%
May2.9%3.1%2.3%2.0%
June1.9%1.5%1.7%1.6%
July1.7%1.8%2.0%2.9%
August3.4%3.5%4.0%4.2%
September3.7%4.5%5.5%6.0%
October7.0%8.1%8.7%9.2%
November8.1%6.0%3.4%2.1%
December1.0%1.3%0.5%0.5%

Neighboring states

  • Idaho: arrives late August, 19 weeks later than Montana
  • Wyoming: arrives early April, in the same week than Montana
  • Utah: arrives the second week of October, 23 weeks earlier than Montana
  • Washington: arrives early September, 20 weeks later than Montana

Common questions

When do Pied-billed Grebes arrive in Montana?
Pied-billed Grebes are winter birds in Montana: the first arrive in early April, they are common by the second week of April, peak in late October (8.7% of checklists), and most are gone by late November.
When do Pied-billed Grebes leave Montana?
Most Pied-billed Grebes have left Montana by late November, when reports fall below half their usual rate. Stragglers are still reported until early December.
When is the best time to see a Pied-billed Grebe in Montana?
The Pied-billed Grebe is reported most often in late October, on about 8.7% of Montana checklists.
Where in Montana are Pied-billed Grebes seen most often?
By county, Fallon County, Rosebud County, and Pondera County have the highest peak reporting rates for the Pied-billed Grebe (counties with at least 200 checklists).