WhenToBird

4 goose species in Montana

When Do Geese Arrive in Montana?

Adult Canada Goose
Photo: Tser, CC BY 4.0 via iNaturalist

Canada Geese, Snow Geese, and Cackling Geese are the geese you are most likely to see in Montana. Canada Geese are in Montana all year, but most are here in spring: numbers build from early March, peak in mid April (53% of checklists), and fall back by mid May. In the quietest week (late June) they are still on about 12% of checklists.

When to look

Numbers buildMar 1-7early March
PeakApr 15-21mid April
Fall back byMay 15-21mid May
FewestJun 22-30late June

Best: mid April. Here all year; numbers build from early March and fall back by mid May. Peak: on about 53% of Montana checklists.

  1. Jancommon
  2. Febcommon
  3. Marpeak season
  4. Aprpeak season
  5. Maypeak season
  6. Juncommon
  7. Juluncommon
  8. Auguncommon
  9. Sepcommon
  10. Octcommon
  11. Novcommon
  12. Deccommon

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

Geese in Montana, species by species

SpeciesFirst arrivalsCommon byPeakMost gone byPeak %
Canada GooseMar 1-7Mar 1-7Apr 15-21May 15-2153%
Snow GooseMar 8-14Mar 8-14Apr 1-7May 1-76.9%
Cackling GooseOct 22-31Oct 22-31Nov 15-21Feb 8-143.6%
Ross's GooseMar 8-14Mar 8-14Apr 8-14May 8-141.0%
0%20%40%60%Canada GooseSnow GooseCackling GooseRoss's GooseJanFebMarAprMayJunJulAugSepOctNovDec
  • Canada Goose
  • Snow Goose
  • Cackling Goose
  • Ross's Goose
Share of complete checklists reporting each species, by week (4 per month). Gaps: fewer than 10 checklists that week.

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.

Where in Montana

Best counties for Canada Goose

Share of checklists at the peak
  1. Fallon CountyBest late March · 11 checklists that week, 542 in all89%
  2. Big Horn CountyBest the second week of March · 14 checklists that week, 1,279 in all80%
  3. Chouteau CountyBest late March · 11 checklists that week, 954 in all80%
  4. Custer CountyBest late November · 14 checklists that week, 1,404 in all80%
  5. Musselshell CountyBest early April · 14 checklists that week, 961 in all80%
  6. Rosebud CountyBest early April · 19 checklists that week, 795 in all76%

Common questions

When do geese arrive in Montana?
Canada Geese are in Montana all year, but most are here in spring: numbers build from early March, peak in mid April (53% of checklists), and fall back by mid May. In the quietest week (late June) they are still on about 12% of checklists.
When do geese leave Montana?
Canada Geese never fully leave Montana: numbers fall back below half their usual rate by mid May, but some are still reported in every week, about 12% of checklists at the low.
When is the best time to see geese in Montana?
The Canada Goose is reported most often in mid April, on about 53% of Montana checklists.
Which geese are in Montana?
Canada Goose, Snow Goose, Cackling Goose, and Ross's Goose are reported regularly; the Canada Goose is the most common.