WhenToBird

Zonotrichia leucophrys · Passerellidae

When Do White-crowned Sparrows Arrive in New Mexico?

Adult White-crowned Sparrow
Photo: Alan Rockefeller, CC BY 4.0 via iNaturalist

White-crowned Sparrows are winter birds in New Mexico: the first arrive in the second week of September, they are common by late September, peak in early November (42% of checklists), and most are gone by the second week of May.

When to look

First arrivalsSep 8-14the second week of September
Common bySep 22-30late September
PeakNov 1-7early November
Most gone byMay 8-14the second week of May

Best: early November. First arrivals the second week of September; most are gone by the second week of May. Peak: on about 42% of New Mexico checklists.

  1. Janpeak season
  2. Febcommon
  3. Marpeak season
  4. Aprpeak season
  5. Maycommon
  6. Junrare
  7. Julnot usually seen
  8. Augnot usually seen
  9. Sepcommon
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

0%20%40%60%Jan 1-7: 36% of 11827 checklistsJan 8-14: 35% of 9370 checklistsJan 15-21: 33% of 9561 checklistsJan 22-31: 33% of 12707 checklistsFeb 1-7: 30% of 9365 checklistsFeb 8-14: 29% of 10141 checklistsFeb 15-21: 30% of 12431 checklistsFeb 22-28: 31% of 9159 checklistsMar 1-7: 32% of 9348 checklistsMar 8-14: 32% of 9704 checklistsMar 15-21: 33% of 9896 checklistsMar 22-31: 32% of 14679 checklistsApr 1-7: 34% of 11145 checklistsApr 8-14: 34% of 11939 checklistsApr 15-21: 33% of 12885 checklistsApr 22-30: 28% of 17935 checklistsMay 1-7: 22% of 15202 checklistsMay 8-14: 19% of 16604 checklistsMay 15-21: 14% of 12720 checklistsMay 22-31: 5.4% of 16699 checklistsJun 1-7: 0.7% of 9889 checklistsJun 8-14: 0.5% of 9322 checklistsJun 15-21: 0.5% of 8341 checklistsJun 22-30: 0.6% of 10562 checklistsJul 1-7: 0.7% of 9036 checklistsJul 8-14: 0.7% of 8461 checklistsJul 15-21: 0.7% of 8585 checklistsJul 22-31: 0.5% of 11800 checklistsAug 1-7: 0.3% of 8289 checklistsAug 8-14: 0.4% of 8882 checklistsAug 15-21: 0.4% of 9136 checklistsAug 22-31: 0.4% of 12662 checklistsSep 1-7: 1.2% of 9936 checklistsSep 8-14: 3.7% of 9581 checklistsSep 15-21: 12% of 9355 checklistsSep 22-30: 24% of 12402 checklistsOct 1-7: 32% of 9467 checklistsOct 8-14: 38% of 10279 checklistsOct 15-21: 40% of 8990 checklistsOct 22-31: 42% of 11986 checklistsNov 1-7: 42% of 8461 checklistsNov 8-14: 41% of 8801 checklistsNov 15-21: 39% of 8616 checklistsNov 22-30: 39% of 11088 checklistsDec 1-7: 38% of 8444 checklistsDec 8-14: 39% of 8575 checklistsDec 15-21: 38% of 10958 checklistsDec 22-31: 36% 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. Roosevelt CountyBest the second week of December · 36 checklists that week, 4,563 in all86%
  2. Sierra CountyBest late November · 325 checklists that week, 13,458 in all63%
  3. Valencia CountyBest the second week of December · 102 checklists that week, 8,351 in all60%
  4. Quay CountyBest late October · 51 checklists that week, 2,220 in all58%
  5. Lea CountyBest the second week of April · 95 checklists that week, 2,698 in all58%
  6. Hidalgo CountyBest mid November · 61 checklists that week, 7,579 in all57%

Best spots

Share of checklists at the peak
  1. Rio Rancho BosqueSandoval County, best the second week of December · 24 checklists that week, 1,108 in all97%
  2. HillsboroSierra County, best the second week of November · 21 checklists that week, 1,041 in all96%
  3. Roswell Bird and Nature CenterChaves County, best the second week of April · 23 checklists that week, 658 in all96%
  4. Bosque del Apache National Wildlife RefugeSocorro County, best early February · 93 checklists that week, 3,736 in all95%

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

Best time of day

In New Mexico, the White-crowned Sparrow is most often listed on checklists started between 7 and 9 am (28% of those checklists).

0%10%20%30%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: 21% of 29677 checklists7 am: 27% of 71785 checklists8 am: 28% of 79208 checklists9 am: 26% of 61605 checklists10 am: 23% of 49588 checklists11 am: 22% of 38079 checklists12 pm: 21% of 31089 checklists1 pm: 22% of 27524 checklists2 pm: 23% of 26644 checklists3 pm: 23% of 26849 checklists4 pm: 20% of 25156 checklists5 pm: 16% of 19061 checklists6 pm: 11% 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
January36%35%33%33%
February30%29%30%31%
March32%32%33%32%
April34%34%33%28%
May22%19%14%5.4%
June0.7%0.5%0.5%0.6%
July0.7%0.7%0.7%0.5%
August0.3%0.4%0.4%0.4%
September1.2%3.7%12%24%
October32%38%40%42%
November42%41%39%39%
December38%39%38%36%

Neighboring states

  • Arizona: arrives the second week of September, in the same week than New Mexico
  • Colorado: arrives late September, 2 weeks later than New Mexico
  • Utah: year-round, peaks the second week of October
  • Oklahoma: arrives early October, 3 weeks later than New Mexico

Common questions

When do White-crowned Sparrows arrive in New Mexico?
White-crowned Sparrows are winter birds in New Mexico: the first arrive in the second week of September, they are common by late September, peak in early November (42% of checklists), and most are gone by the second week of May.
When do White-crowned Sparrows leave New Mexico?
Most White-crowned Sparrows have left New Mexico by the second week of May, when reports fall below half their usual rate. Stragglers are still reported until late May.
When is the best time to see a White-crowned Sparrow in New Mexico?
The White-crowned Sparrow is reported most often in early November, on about 42% of New Mexico checklists.
Where in New Mexico are White-crowned Sparrows seen most often?
By county, Roosevelt County, Sierra County, and Valencia County have the highest peak reporting rates for the White-crowned Sparrow (counties with at least 200 checklists).