WhenToBird

Gray Catbird · Dumetella carolinensis

When Do Catbirds Arrive in Wyoming?

Adult Gray Catbird
Photo: Melanie Gaddy, CC0 1.0 via iNaturalist

Gray Catbirds reach Wyoming in early May, are common by the second week of May, peak in late May (11% of checklists), and most are gone by mid September.

When to look

First arrivalsMay 1-7early May
Common byMay 8-14the second week of May
PeakMay 22-31late May
Most gone bySep 15-21mid September

Best: late May. First arrivals early May; most are gone by mid September. Peak: on about 11% of Wyoming checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marnot usually seen
  4. Aprnot usually seen
  5. Maypeak season
  6. Junpeak season
  7. Julcommon
  8. Augcommon
  9. Sepcommon
  10. Octrare
  11. Novnot usually seen
  12. Decnot usually seen

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

Catbirds in Wyoming, species by species

SpeciesFirst arrivalsCommon byPeakMost gone byPeak %
Gray CatbirdMay 1-7May 8-14May 22-31Sep 15-2111%
0%5%10%15%Gray CatbirdJanFebMarAprMayJunJulAugSepOctNovDec
  • Gray Catbird
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 Wyoming 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 Wyoming

Best counties for Gray Catbird

Share of checklists at the peak
  1. Campbell CountyBest the second week of September · 69 checklists that week, 2,801 in all50%
  2. Weston CountyBest mid September · 52 checklists that week, 2,297 in all30%
  3. Converse CountyBest late May · 213 checklists that week, 3,460 in all27%
  4. Sheridan CountyBest late May · 352 checklists that week, 6,459 in all23%
  5. Fremont CountyBest late May · 1152 checklists that week, 27,707 in all23%
  6. Natrona CountyBest late May · 347 checklists that week, 5,810 in all21%

Common questions

When do catbirds arrive in Wyoming?
Gray Catbirds reach Wyoming in early May, are common by the second week of May, peak in late May (11% of checklists), and most are gone by mid September.
When do catbirds leave Wyoming?
Most Gray Catbirds have left Wyoming by mid September, when reports fall below half their usual rate. Stragglers are still reported until early October.
When is the best time to see catbirds in Wyoming?
The Gray Catbird is reported most often in late May, on about 11% of Wyoming checklists.