WhenToBird

Falco peregrinus · Falconidae

When Do Peregrine Falcons Arrive in Nevada?

Adult Peregrine Falcon
Photo: Andrea Poggi, CC BY 4.0 via iNaturalist

Peregrine Falcons arrive in Nevada in the second week of June, peak in the second week of September (2.4% of checklists), and most are gone by mid May.

When to look

First arrivalsJun 8-14the second week of June
Common byJun 8-14the second week of June
PeakSep 8-14the second week of September
Most gone byMay 15-21mid May

Best: the second week of September. First arrivals the second week of June; most are gone by mid May. Peak: on about 2.4% of Nevada checklists.

  1. Janpeak season
  2. Febcommon
  3. Marcommon
  4. Aprcommon
  5. Maycommon
  6. Jununcommon
  7. Julcommon
  8. Augpeak season
  9. Seppeak season
  10. Octpeak season
  11. Novpeak season
  12. Deccommon

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

0%1%2%3%Jan 1-7: 1.8% of 5121 checklistsJan 8-14: 2.0% of 3908 checklistsJan 15-21: 2.5% of 4000 checklistsJan 22-31: 1.6% of 4991 checklistsFeb 1-7: 1.5% of 3377 checklistsFeb 8-14: 1.3% of 3747 checklistsFeb 15-21: 1.3% of 4852 checklistsFeb 22-28: 1.0% of 3712 checklistsMar 1-7: 1.3% of 3745 checklistsMar 8-14: 1.1% of 3763 checklistsMar 15-21: 0.8% of 4188 checklistsMar 22-31: 1.3% of 6027 checklistsApr 1-7: 1.0% of 4679 checklistsApr 8-14: 1.3% of 4609 checklistsApr 15-21: 1.4% of 4709 checklistsApr 22-30: 1.2% of 6984 checklistsMay 1-7: 1.1% of 5702 checklistsMay 8-14: 1.0% of 5928 checklistsMay 15-21: 0.7% of 5353 checklistsMay 22-31: 0.6% of 7352 checklistsJun 1-7: 0.9% of 4360 checklistsJun 8-14: 0.7% of 4183 checklistsJun 15-21: 0.9% of 3751 checklistsJun 22-30: 0.7% of 4126 checklistsJul 1-7: 1.2% of 3231 checklistsJul 8-14: 1.1% of 3024 checklistsJul 15-21: 1.0% of 2967 checklistsJul 22-31: 1.2% of 4212 checklistsAug 1-7: 1.6% of 2828 checklistsAug 8-14: 1.8% of 3036 checklistsAug 15-21: 2.0% of 3076 checklistsAug 22-31: 2.1% of 4345 checklistsSep 1-7: 2.2% of 3369 checklistsSep 8-14: 2.6% of 3728 checklistsSep 15-21: 2.4% of 3535 checklistsSep 22-30: 2.1% of 5028 checklistsOct 1-7: 2.1% of 3976 checklistsOct 8-14: 2.6% of 3781 checklistsOct 15-21: 2.2% of 3577 checklistsOct 22-31: 2.3% of 4986 checklistsNov 1-7: 1.9% of 3592 checklistsNov 8-14: 2.1% of 3685 checklistsNov 15-21: 2.1% of 3399 checklistsNov 22-30: 1.9% of 4544 checklistsDec 1-7: 1.5% of 3162 checklistsDec 8-14: 1.8% of 3191 checklistsDec 15-21: 1.6% of 3615 checklistsDec 22-31: 1.5% of 5101 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 Nevada 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 Nevada

Best counties

Share of checklists at the peak
  1. Pershing CountyBest late November · 26 checklists that week, 1,407 in all8.9%
  2. Clark CountyBest early October · 1580 checklists that week, 80,458 in all4.5%
  3. Churchill CountyBest the second week of November · 27 checklists that week, 3,104 in all3.5%
  4. Douglas CountyBest late July · 158 checklists that week, 7,476 in all3.2%
  5. Lander CountyBest late March · 40 checklists that week, 1,413 in all3.1%
  6. Lincoln CountyBest mid August · 45 checklists that week, 3,842 in all2.9%

Best spots

Share of checklists at the peak
  1. Pitch Fork CoveClark County, best mid September · 26 checklists that week, 1,958 in all40%
  2. Robert B. Griffith Water ProjectClark County, best early October · 28 checklists that week, 2,177 in all30%
  3. Swan LakeWashoe County, best the second week of August · 23 checklists that week, 569 in all14%
  4. Mount PisgahElko County, best late September · 25 checklists that week, 309 in all14%
  5. Idlewild ParkWashoe County, best the second week of December · 27 checklists that week, 879 in all12%
  6. Fletcher CanyonClark County, best early August · 21 checklists that week, 447 in all11%

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

Best time of day

In Nevada, the Peregrine Falcon is most often listed on checklists started between 5 and 7 am (3.1% of those checklists).

0%1%2%3%4%12 am: too few checklists (114) to judge1 am: too few checklists (99) to judge2 am: too few checklists (71) to judge3 am: too few checklists (108) to judge4 am: too few checklists (459) to judge5 am: 3.2% of 4313 checklists6 am: 3.0% of 17070 checklists7 am: 2.6% of 27389 checklists8 am: 1.5% of 24858 checklists9 am: 1.2% of 22012 checklists10 am: 1.1% of 19284 checklists11 am: 1.1% of 15592 checklists12 pm: 0.8% of 12432 checklists1 pm: 0.9% of 11386 checklists2 pm: 0.9% of 11262 checklists3 pm: 1.0% of 10721 checklists4 pm: 1.0% of 9090 checklists5 pm: 1.0% of 6397 checklists6 pm: 0.9% of 5012 checklists7 pm: too few checklists (3026) to judge8 pm: too few checklists (905) to judge9 pm: too few checklists (271) to judge10 pm: too few checklists (164) to judge11 pm: too few checklists (120) 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
January1.8%2.0%2.5%1.6%
February1.5%1.3%1.3%1.0%
March1.3%1.1%0.8%1.3%
April1.0%1.3%1.4%1.2%
May1.1%1.0%0.7%0.6%
June0.9%0.7%0.9%0.7%
July1.2%1.1%1.0%1.2%
August1.6%1.8%2.0%2.1%
September2.2%2.6%2.4%2.1%
October2.1%2.6%2.2%2.3%
November1.9%2.1%2.1%1.9%
December1.5%1.8%1.6%1.5%

Neighboring states

  • California: arrives late May, 2 weeks earlier than Nevada
  • Utah: arrives late February, 14 weeks earlier than Nevada
  • Idaho: arrives late January, 18 weeks earlier than Nevada
  • Arizona: arrives late May, 2 weeks earlier than Nevada

Common questions

When do Peregrine Falcons arrive in Nevada?
Peregrine Falcons arrive in Nevada in the second week of June, peak in the second week of September (2.4% of checklists), and most are gone by mid May.
When do Peregrine Falcons leave Nevada?
Most Peregrine Falcons have left Nevada by mid May, when reports fall below half their usual rate.
When is the best time to see a Peregrine Falcon in Nevada?
The Peregrine Falcon is reported most often in the second week of September, on about 2.4% of Nevada checklists.
Where in Nevada are Peregrine Falcons seen most often?
By county, Pershing County, Clark County, and Churchill County have the highest peak reporting rates for the Peregrine Falcon (counties with at least 200 checklists).