WhenToBird

Spizella breweri · Passerellidae

When Do Brewer's Sparrows Arrive in New Mexico?

Adult Brewer's Sparrow
Photo: Daughter Dad, CC BY 4.0 via iNaturalist

Brewer's Sparrows arrive in New Mexico in early August, peak in the second week of September (11% of checklists), and most are gone by late May.

When to look

First arrivalsAug 1-7early August
Common byAug 1-7early August
PeakSep 8-14the second week of September
Most gone byMay 22-31late May

Best: the second week of September. First arrivals early August; most are gone by late May. Peak: on about 11% of New Mexico checklists.

  1. Januncommon
  2. Febuncommon
  3. Maruncommon
  4. Aprcommon
  5. Maycommon
  6. Junrare
  7. Julrare
  8. Augcommon
  9. Seppeak season
  10. Octcommon
  11. Novuncommon
  12. Decuncommon

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

0%5%10%15%Jan 1-7: 1.8% of 11827 checklistsJan 8-14: 2.0% of 9370 checklistsJan 15-21: 1.9% of 9561 checklistsJan 22-31: 1.7% of 12707 checklistsFeb 1-7: 1.7% of 9365 checklistsFeb 8-14: 1.7% of 10141 checklistsFeb 15-21: 1.6% of 12431 checklistsFeb 22-28: 2.3% of 9159 checklistsMar 1-7: 2.0% of 9348 checklistsMar 8-14: 2.6% of 9704 checklistsMar 15-21: 2.8% of 9896 checklistsMar 22-31: 3.3% of 14679 checklistsApr 1-7: 3.8% of 11145 checklistsApr 8-14: 4.4% of 11939 checklistsApr 15-21: 5.9% of 12885 checklistsApr 22-30: 6.6% of 17935 checklistsMay 1-7: 6.2% of 15202 checklistsMay 8-14: 4.4% of 16604 checklistsMay 15-21: 2.6% of 12720 checklistsMay 22-31: 0.9% of 16699 checklistsJun 1-7: 0.5% of 9889 checklistsJun 8-14: 0.5% of 9322 checklistsJun 15-21: 0.5% of 8341 checklistsJun 22-30: 0.5% of 10562 checklistsJul 1-7: 0.5% of 9036 checklistsJul 8-14: 0.7% of 8461 checklistsJul 15-21: 0.8% of 8585 checklistsJul 22-31: 0.9% of 11800 checklistsAug 1-7: 1.1% of 8289 checklistsAug 8-14: 1.8% of 8882 checklistsAug 15-21: 3.9% of 9136 checklistsAug 22-31: 7.7% of 12662 checklistsSep 1-7: 12% of 9936 checklistsSep 8-14: 11% of 9581 checklistsSep 15-21: 10% of 9355 checklistsSep 22-30: 7.6% of 12402 checklistsOct 1-7: 4.8% of 9467 checklistsOct 8-14: 2.7% of 10279 checklistsOct 15-21: 1.8% of 8990 checklistsOct 22-31: 1.5% of 11986 checklistsNov 1-7: 1.4% of 8461 checklistsNov 8-14: 1.3% of 8801 checklistsNov 15-21: 1.7% of 8616 checklistsNov 22-30: 1.8% of 11088 checklistsDec 1-7: 2.0% of 8444 checklistsDec 8-14: 2.1% of 8575 checklistsDec 15-21: 1.9% of 10958 checklistsDec 22-31: 1.9% of 14523 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 New Mexico 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 New Mexico

Best counties

Share of checklists at the peak
  1. Hidalgo CountyBest early April · 283 checklists that week, 7,579 in all28%
  2. Luna CountyBest the second week of September · 45 checklists that week, 3,814 in all25%
  3. McKinley CountyBest the second week of September · 45 checklists that week, 2,545 in all23%
  4. Dona Ana CountyBest the second week of September · 569 checklists that week, 29,776 in all20%
  5. Sierra CountyBest mid April · 280 checklists that week, 13,458 in all19%
  6. Harding CountyBest the second week of September · 31 checklists that week, 932 in all17%

Best spots

Share of checklists at the peak
  1. Four Hills StableBernalillo County, best late April · 37 checklists that week, 392 in all60%
  2. HillsboroSierra County, best the second week of November · 21 checklists that week, 1,041 in all53%
  3. Leasburg Dam State ParkDona Ana County, best mid April · 26 checklists that week, 1,017 in all53%

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

Best time of day

In New Mexico, the Brewer's Sparrow is most often listed on checklists started between 6 and 8 am (4.9% of those checklists).

0%2%4%6%12 am: too few checklists (186) to judge1 am: too few checklists (180) to judge2 am: too few checklists (172) to judge3 am: too few checklists (183) to judge4 am: too few checklists (527) to judge5 am: too few checklists (4013) to judge6 am: 5.0% of 29677 checklists7 am: 4.8% of 71785 checklists8 am: 4.2% of 79208 checklists9 am: 3.3% of 61605 checklists10 am: 2.8% of 49588 checklists11 am: 2.3% of 38079 checklists12 pm: 2.3% of 31089 checklists1 pm: 2.1% of 27524 checklists2 pm: 2.1% of 26644 checklists3 pm: 1.9% of 26849 checklists4 pm: 2.1% of 25156 checklists5 pm: 2.5% of 19061 checklists6 pm: 2.4% of 15112 checklists7 pm: too few checklists (9040) to judge8 pm: too few checklists (2738) to judge9 pm: too few checklists (736) to judge10 pm: too few checklists (384) to judge11 pm: too few checklists (208) 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%1.9%1.7%
February1.7%1.7%1.6%2.3%
March2.0%2.6%2.8%3.3%
April3.8%4.4%5.9%6.6%
May6.2%4.4%2.6%0.9%
June0.5%0.5%0.5%0.5%
July0.5%0.7%0.8%0.9%
August1.1%1.8%3.9%7.7%
September12%11%10%7.6%
October4.8%2.7%1.8%1.5%
November1.4%1.3%1.7%1.8%
December2.0%2.1%1.9%1.9%

Neighboring states

  • Arizona: arrives mid August, 2 weeks later than New Mexico
  • Colorado: arrives late April, 13 weeks earlier than New Mexico
  • Utah: arrives mid April, 14 weeks earlier than New Mexico
  • Wyoming: arrives late April, 13 weeks earlier than New Mexico

Common questions

When do Brewer's Sparrows arrive in New Mexico?
Brewer's Sparrows arrive in New Mexico in early August, peak in the second week of September (11% of checklists), and most are gone by late May.
When do Brewer's Sparrows leave New Mexico?
Most Brewer's Sparrows have left New Mexico by late May, when reports fall below half their usual rate.
When is the best time to see a Brewer's Sparrow in New Mexico?
The Brewer's Sparrow is reported most often in the second week of September, on about 11% of New Mexico checklists.
Where in New Mexico are Brewer's Sparrows seen most often?
By county, Hidalgo County, Luna County, and McKinley County have the highest peak reporting rates for the Brewer's Sparrow (counties with at least 200 checklists).