WhenToBird

Calypte anna · Trochilidae

When Do Anna's Hummingbirds Arrive in Utah?

Adult male Anna's Hummingbird
Photo: Claude Lyneis, CC0 1.0 via iNaturalist

Anna's Hummingbirds arrive in Utah in mid August, peak in early April (2.6% of checklists), and most are gone by mid May.

When to look

First arrivalsAug 15-21mid August
Common byAug 15-21mid August
PeakApr 1-7early April
Most gone byMay 15-21mid May

Best: early April. First arrivals mid August; most are gone by mid May. Peak: on about 2.6% of Utah checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marpeak season
  4. Aprpeak season
  5. Maycommon
  6. Jununcommon
  7. Juluncommon
  8. Augcommon
  9. Sepcommon
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

0%1%2%3%Jan 1-7: 1.2% of 10857 checklistsJan 8-14: 1.5% of 8333 checklistsJan 15-21: 2.0% of 8360 checklistsJan 22-31: 2.3% of 10516 checklistsFeb 1-7: 2.1% of 7416 checklistsFeb 8-14: 2.4% of 8082 checklistsFeb 15-21: 2.6% of 9643 checklistsFeb 22-28: 2.2% of 7960 checklistsMar 1-7: 2.6% of 7998 checklistsMar 8-14: 2.0% of 8581 checklistsMar 15-21: 2.3% of 8637 checklistsMar 22-31: 2.8% of 13006 checklistsApr 1-7: 2.5% of 10562 checklistsApr 8-14: 2.6% of 11694 checklistsApr 15-21: 1.6% of 11382 checklistsApr 22-30: 2.5% of 16626 checklistsMay 1-7: 1.9% of 13523 checklistsMay 8-14: 1.3% of 14714 checklistsMay 15-21: 1.1% of 13711 checklistsMay 22-31: 0.9% of 16546 checklistsJun 1-7: 0.6% of 10284 checklistsJun 8-14: 0.5% of 9530 checklistsJun 15-21: 0.4% of 8854 checklistsJun 22-30: 0.5% of 10566 checklistsJul 1-7: 0.5% of 7987 checklistsJul 8-14: 0.6% of 7471 checklistsJul 15-21: 0.6% of 7240 checklistsJul 22-31: 0.8% of 9329 checklistsAug 1-7: 0.8% of 6521 checklistsAug 8-14: 0.7% of 6423 checklistsAug 15-21: 1.0% of 6208 checklistsAug 22-31: 1.2% of 9089 checklistsSep 1-7: 1.2% of 7081 checklistsSep 8-14: 1.3% of 7306 checklistsSep 15-21: 1.6% of 7208 checklistsSep 22-30: 1.6% of 8876 checklistsOct 1-7: 1.7% of 7265 checklistsOct 8-14: 2.1% of 7226 checklistsOct 15-21: 2.1% of 7007 checklistsOct 22-31: 2.0% of 8443 checklistsNov 1-7: 2.1% of 6711 checklistsNov 8-14: 2.2% of 6290 checklistsNov 15-21: 1.6% of 6169 checklistsNov 22-30: 1.8% of 8228 checklistsDec 1-7: 1.4% of 6011 checklistsDec 8-14: 1.2% of 6044 checklistsDec 15-21: 1.4% of 6721 checklistsDec 22-31: 3.0% of 9982 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 Utah 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 Utah

Best counties

Share of checklists at the peak
  1. Washington CountyBest mid February · 1137 checklists that week, 43,893 in all22%
  2. Grand CountyBest early November · 383 checklists that week, 18,662 in all1.7%
  3. Weber CountyBest mid November · 213 checklists that week, 13,172 in all1.2%
  4. Box Elder CountyBest the second week of December · 137 checklists that week, 9,867 in all0.7%
  5. Cache CountyBest the second week of August · 267 checklists that week, 21,769 in all0.2%
  6. Utah CountyBest the second week of December · 1098 checklists that week, 70,971 in all0.2%

Best spots

Share of checklists at the peak
  1. Santa Clara ReservoirWashington County, best late April · 25 checklists that week, 199 in all85%
  2. Moquitch HillWashington County, best early October · 21 checklists that week, 994 in all71%
  3. Brooks Nature ParkWashington County, best early November · 20 checklists that week, 443 in all56%
  4. Royal Oaks ParkWashington County, best the second week of November · 26 checklists that week, 361 in all55%
  5. Tonaquint ParkWashington County, best early March · 84 checklists that week, 3,677 in all53%
  6. Santa Clara RiverWashington County, best late March · 25 checklists that week, 379 in all52%

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

Best time of day

In Utah, the Anna's Hummingbird is most often listed on checklists started between 7 and 9 am (2.3% of those checklists).

0%1%2%3%12 am: too few checklists (242) to judge1 am: too few checklists (178) to judge2 am: too few checklists (169) to judge3 am: too few checklists (162) to judge4 am: too few checklists (284) to judge5 am: too few checklists (1984) to judge6 am: 1.6% of 11714 checklists7 am: 2.3% of 33209 checklists8 am: 2.3% of 46944 checklists9 am: 2.2% of 46290 checklists10 am: 1.7% of 43144 checklists11 am: 1.6% of 36893 checklists12 pm: 1.4% of 32758 checklists1 pm: 1.3% of 30142 checklists2 pm: 1.2% of 29414 checklists3 pm: 1.3% of 29491 checklists4 pm: 1.4% of 29154 checklists5 pm: 1.2% of 22256 checklists6 pm: 1.2% of 17383 checklists7 pm: 1.0% of 13099 checklists8 pm: too few checklists (6647) to judge9 pm: too few checklists (1753) to judge10 pm: too few checklists (599) to judge11 pm: too few checklists (307) 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
January1.2%1.5%2.0%2.3%
February2.1%2.4%2.6%2.2%
March2.6%2.0%2.3%2.8%
April2.5%2.6%1.6%2.5%
May1.9%1.3%1.1%0.9%
June0.6%0.5%0.4%0.5%
July0.5%0.6%0.6%0.8%
August0.8%0.7%1.0%1.2%
September1.2%1.3%1.6%1.6%
October1.7%2.1%2.1%2.0%
November2.1%2.2%1.6%1.8%
December1.4%1.2%1.4%3.0%

Neighboring states

  • Nevada: year-round, peaks the second week of March
  • Idaho: arrives the second week of September, 3 weeks later than Utah
  • Arizona: year-round, peaks the second week of October
  • California: year-round, peaks late September

Common questions

When do Anna's Hummingbirds arrive in Utah?
Anna's Hummingbirds arrive in Utah in mid August, peak in early April (2.6% of checklists), and most are gone by mid May.
When do Anna's Hummingbirds leave Utah?
Most Anna's Hummingbirds have left Utah by mid May, when reports fall below half their usual rate.
When is the best time to see a Anna's Hummingbird in Utah?
The Anna's Hummingbird is reported most often in early April, on about 2.6% of Utah checklists.
Where in Utah are Anna's Hummingbirds seen most often?
By county, Washington County, Grand County, and Weber County have the highest peak reporting rates for the Anna's Hummingbird (counties with at least 200 checklists).