WhenToBird

Spinus pinus · Fringillidae

When Do Pine Siskins Arrive in Arizona?

Adult Pine Siskin
Photo: Dominique Bérubé, CC0 1.0 via iNaturalist

Pine Siskins reach Arizona in late September, are common by mid October, peak in the second week of April (11% of checklists), and most are gone by early June.

When to look

First arrivalsSep 22-30late September
Common byOct 15-21mid October
PeakApr 8-14the second week of April
Most gone byJun 1-7early June

Best: the second week of April. First arrivals late September; most are gone by early June. Peak: on about 11% of Arizona checklists.

  1. Jancommon
  2. Febcommon
  3. Marpeak season
  4. Aprpeak season
  5. Maypeak season
  6. Juncommon
  7. Juluncommon
  8. Auguncommon
  9. Sepuncommon
  10. Octcommon
  11. Novcommon
  12. Decuncommon

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

0%5%10%15%Jan 1-7: 4.6% of 34758 checklistsJan 8-14: 5.0% of 29835 checklistsJan 15-21: 4.7% of 29279 checklistsJan 22-31: 5.6% of 39716 checklistsFeb 1-7: 6.1% of 27299 checklistsFeb 8-14: 6.5% of 28703 checklistsFeb 15-21: 6.7% of 35357 checklistsFeb 22-28: 8.0% of 29889 checklistsMar 1-7: 8.6% of 29932 checklistsMar 8-14: 8.7% of 32982 checklistsMar 15-21: 9.9% of 34731 checklistsMar 22-31: 10% of 50213 checklistsApr 1-7: 11% of 35788 checklistsApr 8-14: 11% of 38087 checklistsApr 15-21: 11% of 41520 checklistsApr 22-30: 10% of 55218 checklistsMay 1-7: 9.2% of 39688 checklistsMay 8-14: 8.7% of 39398 checklistsMay 15-21: 7.9% of 29562 checklistsMay 22-31: 6.0% of 36774 checklistsJun 1-7: 3.9% of 21313 checklistsJun 8-14: 2.8% of 19129 checklistsJun 15-21: 2.2% of 17922 checklistsJun 22-30: 2.3% of 21188 checklistsJul 1-7: 2.5% of 17325 checklistsJul 8-14: 2.8% of 16463 checklistsJul 15-21: 2.3% of 18642 checklistsJul 22-31: 2.1% of 31215 checklistsAug 1-7: 1.9% of 28163 checklistsAug 8-14: 2.3% of 31329 checklistsAug 15-21: 2.1% of 23878 checklistsAug 22-31: 1.7% of 28508 checklistsSep 1-7: 1.8% of 20878 checklistsSep 8-14: 1.8% of 19671 checklistsSep 15-21: 1.9% of 19859 checklistsSep 22-30: 2.2% of 25179 checklistsOct 1-7: 2.7% of 19420 checklistsOct 8-14: 3.4% of 21925 checklistsOct 15-21: 4.3% of 20995 checklistsOct 22-31: 4.4% of 29258 checklistsNov 1-7: 4.9% of 21269 checklistsNov 8-14: 4.6% of 22753 checklistsNov 15-21: 4.2% of 21982 checklistsNov 22-30: 3.9% of 29475 checklistsDec 1-7: 3.6% of 20810 checklistsDec 8-14: 3.4% of 22229 checklistsDec 15-21: 3.6% of 25148 checklistsDec 22-31: 4.2% of 39567 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 Arizona 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 Arizona

Best counties

Share of checklists at the peak
  1. Santa Cruz CountyBest late March · 7103 checklists that week, 162,726 in all28%
  2. Cochise CountyBest early April · 5503 checklists that week, 190,093 in all24%
  3. Navajo CountyBest early May · 570 checklists that week, 18,838 in all20%
  4. Coconino CountyBest the second week of May · 3090 checklists that week, 90,870 in all20%
  5. Apache CountyBest early February · 87 checklists that week, 12,931 in all18%
  6. Greenlee CountyBest mid October · 18 checklists that week, 2,745 in all14%

Best spots

Share of checklists at the peak
  1. ParadiseCochise County, best mid March · 40 checklists that week, 2,350 in all79%
  2. Catalina Highway Scenic AreaPima County, best mid April · 139 checklists that week, 2,721 in all76%
  3. Portal (northwest)Cochise County, best the second week of April · 180 checklists that week, 2,872 in all74%

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

Best time of day

In Arizona, the Pine Siskin is most often listed on checklists started between 12 and 2 pm (6.9% of those checklists).

0%2%4%6%8%12 am: too few checklists (488) to judge1 am: too few checklists (503) to judge2 am: too few checklists (489) to judge3 am: too few checklists (735) to judge4 am: too few checklists (4115) to judge5 am: 4.0% of 38350 checklists6 am: 5.5% of 118786 checklists7 am: 6.8% of 183415 checklists8 am: 6.3% of 187346 checklists9 am: 6.1% of 151342 checklists10 am: 6.2% of 124522 checklists11 am: 6.4% of 97088 checklists12 pm: 6.8% of 78110 checklists1 pm: 7.1% of 73059 checklists2 pm: 6.4% of 68912 checklists3 pm: 5.5% of 68060 checklists4 pm: 3.5% of 69387 checklists5 pm: 2.6% of 52951 checklists6 pm: 1.4% of 31061 checklists7 pm: too few checklists (16076) to judge8 pm: too few checklists (5352) to judge9 pm: too few checklists (2369) to judge10 pm: too few checklists (1100) to judge11 pm: too few checklists (604) 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
January4.6%5.0%4.7%5.6%
February6.1%6.5%6.7%8.0%
March8.6%8.7%9.9%10%
April11%11%11%10%
May9.2%8.7%7.9%6.0%
June3.9%2.8%2.2%2.3%
July2.5%2.8%2.3%2.1%
August1.9%2.3%2.1%1.7%
September1.8%1.8%1.9%2.2%
October2.7%3.4%4.3%4.4%
November4.9%4.6%4.2%3.9%
December3.6%3.4%3.6%4.2%

Neighboring states

  • New Mexico: year-round, peaks early May
  • Nevada: arrives late September, in the same week than Arizona
  • Utah: arrives late April, 20 weeks earlier than Arizona
  • California: arrives late September, in the same week than Arizona

Common questions

When do Pine Siskins arrive in Arizona?
Pine Siskins reach Arizona in late September, are common by mid October, peak in the second week of April (11% of checklists), and most are gone by early June.
When do Pine Siskins leave Arizona?
Most Pine Siskins have left Arizona by early June, when reports fall below half their usual rate. Stragglers are still reported until mid July.
When is the best time to see a Pine Siskin in Arizona?
The Pine Siskin is reported most often in the second week of April, on about 11% of Arizona checklists.
Where in Arizona are Pine Siskins seen most often?
By county, Santa Cruz County, Cochise County, and Navajo County have the highest peak reporting rates for the Pine Siskin (counties with at least 200 checklists).