WhenToBird

Haemorhous cassinii · Fringillidae

When Do Cassin's Finches Arrive in Arizona?

Adult male Cassin's Finch
Photo: Craig Martin, CC0 1.0 via iNaturalist

Cassin's Finches arrive in Arizona in early October, peak in the second week of April (2.5% of checklists), and most are gone by the second week of May.

When to look

First arrivalsOct 1-7early October
Common byOct 1-7early October
PeakApr 8-14the second week of April
Most gone byMay 8-14the second week of May

Best: the second week of April. First arrivals early October; most are gone by the second week of May. Peak: on about 2.5% of Arizona checklists.

  1. Jancommon
  2. Febcommon
  3. Marpeak season
  4. Aprpeak season
  5. Maycommon
  6. Junrare
  7. Julrare
  8. Augrare
  9. Sepuncommon
  10. Octpeak season
  11. Novcommon
  12. Deccommon

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

0%1%2%3%Jan 1-7: 1.3% of 34758 checklistsJan 8-14: 1.1% of 29835 checklistsJan 15-21: 1.2% of 29279 checklistsJan 22-31: 1.3% of 39716 checklistsFeb 1-7: 1.5% of 27299 checklistsFeb 8-14: 1.4% of 28703 checklistsFeb 15-21: 1.5% of 35357 checklistsFeb 22-28: 1.5% of 29889 checklistsMar 1-7: 1.6% of 29932 checklistsMar 8-14: 1.6% of 32982 checklistsMar 15-21: 1.7% of 34731 checklistsMar 22-31: 1.9% of 50213 checklistsApr 1-7: 2.3% of 35788 checklistsApr 8-14: 2.7% of 38087 checklistsApr 15-21: 2.5% of 41520 checklistsApr 22-30: 1.9% of 55218 checklistsMay 1-7: 1.5% of 39688 checklistsMay 8-14: 0.9% of 39398 checklistsMay 15-21: 0.5% of 29562 checklistsMay 22-31: 0.3% of 36774 checklistsJun 1-7: 0.3% of 21313 checklistsJun 8-14: 0.2% of 19129 checklistsJun 15-21: 0.2% of 17922 checklistsJun 22-30: 0.3% of 21188 checklistsJul 1-7: 0.2% of 17325 checklistsJul 8-14: 0.1% of 16463 checklistsJul 15-21: 0.2% of 18642 checklistsJul 22-31: 0.1% of 31215 checklistsAug 1-7: 0.1% of 28163 checklistsAug 8-14: 0.1% of 31329 checklistsAug 15-21: 0.1% of 23878 checklistsAug 22-31: 0.1% of 28508 checklistsSep 1-7: 0.2% of 20878 checklistsSep 8-14: 0.2% of 19671 checklistsSep 15-21: 0.3% of 19859 checklistsSep 22-30: 0.5% of 25179 checklistsOct 1-7: 1.0% of 19420 checklistsOct 8-14: 1.6% of 21925 checklistsOct 15-21: 2.0% of 20995 checklistsOct 22-31: 2.0% of 29258 checklistsNov 1-7: 1.5% of 21269 checklistsNov 8-14: 1.2% of 22753 checklistsNov 15-21: 1.1% of 21982 checklistsNov 22-30: 1.5% of 29475 checklistsDec 1-7: 1.2% of 20810 checklistsDec 8-14: 1.2% of 22229 checklistsDec 15-21: 1.4% of 25148 checklistsDec 22-31: 1.3% 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. Coconino CountyBest late October · 2094 checklists that week, 90,870 in all11%
  2. Navajo CountyBest late February · 256 checklists that week, 18,838 in all11%
  3. Apache CountyBest early April · 173 checklists that week, 12,931 in all6.4%
  4. Cochise CountyBest the second week of April · 6221 checklists that week, 190,093 in all6.3%
  5. Yavapai CountyBest the second week of February · 1623 checklists that week, 83,606 in all5.8%
  6. Gila CountyBest mid February · 345 checklists that week, 14,834 in all4.7%

Best spots

Share of checklists at the peak
  1. Arizona National Scenic Trail (Compass Tank)Pima County, best late December · 23 checklists that week, 197 in all45%
  2. Grand Canyon National Park (Yaki Point)Coconino County, best late October · 23 checklists that week, 311 in all40%
  3. Portal (northwest)Cochise County, best the second week of April · 180 checklists that week, 2,872 in all37%
  4. Picture Canyon Natural and Cultural PreserveCoconino County, best early November · 46 checklists that week, 2,817 in all35%
  5. Tonto National Forest (northeast)Maricopa County, best late January · 20 checklists that week, 729 in all34%

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

Best time of day

In Arizona, the Cassin's Finch is most often listed on checklists started between 7 and 9 am (1.5% of those checklists).

0%0.5%1%1.5%2%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: 0.5% of 38350 checklists6 am: 1.1% of 118786 checklists7 am: 1.6% of 183415 checklists8 am: 1.5% of 187346 checklists9 am: 1.3% of 151342 checklists10 am: 1.2% of 124522 checklists11 am: 1.2% of 97088 checklists12 pm: 1.3% of 78110 checklists1 pm: 1.2% of 73059 checklists2 pm: 1.1% of 68912 checklists3 pm: 1.1% of 68060 checklists4 pm: 0.7% of 69387 checklists5 pm: 0.3% of 52951 checklists6 pm: 0.2% 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
January1.3%1.1%1.2%1.3%
February1.5%1.4%1.5%1.5%
March1.6%1.6%1.7%1.9%
April2.3%2.7%2.5%1.9%
May1.5%0.9%0.5%0.3%
June0.3%0.2%0.2%0.3%
July0.2%0.1%0.2%0.1%
August0.1%0.1%0.1%0.1%
September0.2%0.2%0.3%0.5%
October1.0%1.6%2.0%2.0%
November1.5%1.2%1.1%1.5%
December1.2%1.2%1.4%1.3%

Neighboring states

  • New Mexico: arrives mid September, 2 weeks earlier than Arizona
  • Nevada: arrives mid January, 14 weeks later than Arizona
  • Utah: arrives the second week of January, 13 weeks later than Arizona
  • California: arrives early May, 20 weeks earlier than Arizona

Common questions

When do Cassin's Finches arrive in Arizona?
Cassin's Finches arrive in Arizona in early October, peak in the second week of April (2.5% of checklists), and most are gone by the second week of May.
When do Cassin's Finches leave Arizona?
Most Cassin's Finches have left Arizona by the second week of May, when reports fall below half their usual rate.
When is the best time to see a Cassin's Finch in Arizona?
The Cassin's Finch is reported most often in the second week of April, on about 2.5% of Arizona checklists.
Where in Arizona are Cassin's Finches seen most often?
By county, Coconino County, Navajo County, and Apache County have the highest peak reporting rates for the Cassin's Finch (counties with at least 200 checklists).