WhenToBird

Buteogallus anthracinus · Accipitridae

When Do Common Black Hawks Arrive in Arizona?

Adult Common Black Hawk
Photo: Attila Oláh, CC BY 4.0 via iNaturalist

Common Black Hawks are winter birds in Arizona: they arrive in early March, peak in mid March (3.4% of checklists), and most are gone by the second week of October.

When to look

First arrivalsMar 1-7early March
Common byMar 1-7early March
PeakMar 15-21mid March
Most gone byOct 8-14the second week of October

Best: mid March. First arrivals early March; most are gone by the second week of October. Peak: on about 3.4% of Arizona checklists.

  1. Jannot usually seen
  2. Febrare
  3. Marpeak season
  4. Aprcommon
  5. Maycommon
  6. Juncommon
  7. Juluncommon
  8. Auguncommon
  9. Sepuncommon
  10. Octuncommon
  11. Novrare
  12. Decnot usually seen

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

0%2%4%6%Jan 1-7: 0.1% of 34758 checklistsJan 8-14: 0.1% of 29835 checklistsJan 15-21: 0.1% of 29279 checklistsJan 22-31: 0.1% of 39716 checklistsFeb 1-7: 0.1% of 27299 checklistsFeb 8-14: 0.1% of 28703 checklistsFeb 15-21: 0.2% of 35357 checklistsFeb 22-28: 0.2% of 29889 checklistsMar 1-7: 1.1% of 29932 checklistsMar 8-14: 3.4% of 32982 checklistsMar 15-21: 4.9% of 34731 checklistsMar 22-31: 2.4% of 50213 checklistsApr 1-7: 1.8% of 35788 checklistsApr 8-14: 1.8% of 38087 checklistsApr 15-21: 1.7% of 41520 checklistsApr 22-30: 1.9% of 55218 checklistsMay 1-7: 1.3% of 39688 checklistsMay 8-14: 1.4% of 39398 checklistsMay 15-21: 1.4% of 29562 checklistsMay 22-31: 1.2% of 36774 checklistsJun 1-7: 1.3% of 21313 checklistsJun 8-14: 1.3% of 19129 checklistsJun 15-21: 1.4% of 17922 checklistsJun 22-30: 1.4% of 21188 checklistsJul 1-7: 1.3% of 17325 checklistsJul 8-14: 1.2% of 16463 checklistsJul 15-21: 1.1% of 18642 checklistsJul 22-31: 0.9% of 31215 checklistsAug 1-7: 0.7% of 28163 checklistsAug 8-14: 0.6% of 31329 checklistsAug 15-21: 0.6% of 23878 checklistsAug 22-31: 0.7% of 28508 checklistsSep 1-7: 0.8% of 20878 checklistsSep 8-14: 0.9% of 19671 checklistsSep 15-21: 1.0% of 19859 checklistsSep 22-30: 1.0% of 25179 checklistsOct 1-7: 1.0% of 19420 checklistsOct 8-14: 0.8% of 21925 checklistsOct 15-21: 0.5% of 20995 checklistsOct 22-31: 0.2% of 29258 checklistsNov 1-7: 0.1% of 21269 checklistsNov 8-14: 0.1% of 22753 checklistsNov 15-21: 0.1% of 21982 checklistsNov 22-30: 0.1% of 29475 checklistsDec 1-7: 0.1% of 20810 checklistsDec 8-14: 0.1% of 22229 checklistsDec 15-21: 0.1% of 25148 checklistsDec 22-31: 0.1% 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.

Embed this map on your site

Where in Arizona

Best counties

Share of checklists at the peak
  1. Yavapai CountyBest mid April · 2511 checklists that week, 83,606 in all16%
  2. Greenlee CountyBest mid September · 81 checklists that week, 2,745 in all15%
  3. Santa Cruz CountyBest the second week of March · 5243 checklists that week, 162,726 in all15%
  4. Gila CountyBest mid April · 409 checklists that week, 14,834 in all4.7%
  5. Graham CountyBest late May · 268 checklists that week, 9,876 in all4.1%
  6. Coconino CountyBest mid April · 2653 checklists that week, 90,870 in all2.7%

Best spots

Share of checklists at the peak
  1. CornvilleYavapai County, best late April · 26 checklists that week, 177 in all76%
  2. Tubac Creek (Mavis Wash)Santa Cruz County, best the second week of March · 720 checklists that week, 3,207 in all74%
  3. Bubbling Ponds HatcheryYavapai County, best early April · 88 checklists that week, 3,849 in all72%
  4. Verde River Greenway State Natural AreaYavapai County, best late March · 28 checklists that week, 512 in all46%
  5. Kitty Joe CanyonMaricopa County, best mid April · 22 checklists that week, 526 in all44%

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

Best time of day

In Arizona, the Common Black Hawk is most often listed on checklists started between 8 and 10 am (1.4% 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: 0.9% of 38350 checklists6 am: 1.5% of 118786 checklists7 am: 1.2% of 183415 checklists8 am: 1.5% of 187346 checklists9 am: 1.3% of 151342 checklists10 am: 1.0% of 124522 checklists11 am: 0.8% of 97088 checklists12 pm: 0.7% of 78110 checklists1 pm: 0.6% of 73059 checklists2 pm: 0.6% of 68912 checklists3 pm: 0.6% of 68060 checklists4 pm: 0.5% of 69387 checklists5 pm: 0.5% of 52951 checklists6 pm: 0.4% 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
January0.1%0.1%0.1%0.1%
February0.1%0.1%0.2%0.2%
March1.1%3.4%4.9%2.4%
April1.8%1.8%1.7%1.9%
May1.3%1.4%1.4%1.2%
June1.3%1.3%1.4%1.4%
July1.3%1.2%1.1%0.9%
August0.7%0.6%0.6%0.7%
September0.8%0.9%1.0%1.0%
October1.0%0.8%0.5%0.2%
November0.1%0.1%0.1%0.1%
December0.1%0.1%0.1%0.1%

Neighboring states

  • New Mexico: arrives mid March, 2 weeks later than Arizona

Common questions

When do Common Black Hawks arrive in Arizona?
Common Black Hawks are winter birds in Arizona: they arrive in early March, peak in mid March (3.4% of checklists), and most are gone by the second week of October.
When do Common Black Hawks leave Arizona?
Most Common Black Hawks have left Arizona by the second week of October, when reports fall below half their usual rate.
When is the best time to see a Common Black Hawk in Arizona?
The Common Black Hawk is reported most often in mid March, on about 3.4% of Arizona checklists.
Where in Arizona are Common Black Hawks seen most often?
By county, Yavapai County, Greenlee County, and Santa Cruz County have the highest peak reporting rates for the Common Black Hawk (counties with at least 200 checklists).