WhenToBird

Parabuteo unicinctus · Accipitridae

When Do Harris's Hawks Arrive in Texas?

Adult Harris's Hawk
Photo: Dan Vickers, CC BY 4.0 via iNaturalist

Harris's Hawks are winter birds in Texas: the first arrive in mid September, they are common by late September, peak in the second week of November (3.7% of checklists), and most are gone by the second week of April.

When to look

First arrivalsSep 15-21mid September
Common bySep 22-30late September
PeakNov 8-14the second week of November
Most gone byApr 8-14the second week of April

Best: the second week of November. First arrivals mid September; most are gone by the second week of April. Peak: on about 3.7% of Texas checklists.

  1. Jancommon
  2. Febcommon
  3. Marcommon
  4. Apruncommon
  5. Mayuncommon
  6. Junrare
  7. Juluncommon
  8. Auguncommon
  9. Sepuncommon
  10. Octcommon
  11. Novpeak season
  12. Deccommon

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

0%2%4%6%Jan 1-7: 2.6% of 66038 checklistsJan 8-14: 2.7% of 52445 checklistsJan 15-21: 2.6% of 52985 checklistsJan 22-31: 2.5% of 71020 checklistsFeb 1-7: 2.5% of 52306 checklistsFeb 8-14: 2.5% of 55887 checklistsFeb 15-21: 1.9% of 69016 checklistsFeb 22-28: 2.4% of 52998 checklistsMar 1-7: 2.1% of 50836 checklistsMar 8-14: 2.4% of 51749 checklistsMar 15-21: 2.1% of 53731 checklistsMar 22-31: 1.5% of 82049 checklistsApr 1-7: 1.3% of 65854 checklistsApr 8-14: 1.2% of 78434 checklistsApr 15-21: 1.1% of 92302 checklistsApr 22-30: 0.9% of 122878 checklistsMay 1-7: 0.7% of 74592 checklistsMay 8-14: 0.4% of 61008 checklistsMay 15-21: 0.5% of 43365 checklistsMay 22-31: 0.5% of 52736 checklistsJun 1-7: 0.5% of 31643 checklistsJun 8-14: 0.5% of 30131 checklistsJun 15-21: 0.4% of 26802 checklistsJun 22-30: 0.6% of 32822 checklistsJul 1-7: 0.5% of 27213 checklistsJul 8-14: 0.4% of 24555 checklistsJul 15-21: 0.5% of 24146 checklistsJul 22-31: 0.6% of 34536 checklistsAug 1-7: 0.6% of 25764 checklistsAug 8-14: 0.5% of 26347 checklistsAug 15-21: 0.6% of 28431 checklistsAug 22-31: 0.7% of 42838 checklistsSep 1-7: 0.9% of 35070 checklistsSep 8-14: 0.8% of 33893 checklistsSep 15-21: 1.1% of 32572 checklistsSep 22-30: 1.2% of 43771 checklistsOct 1-7: 1.3% of 34143 checklistsOct 8-14: 1.1% of 37563 checklistsOct 15-21: 1.3% of 36263 checklistsOct 22-31: 1.7% of 49170 checklistsNov 1-7: 3.6% of 43301 checklistsNov 8-14: 4.7% of 48744 checklistsNov 15-21: 2.6% of 42213 checklistsNov 22-30: 2.3% of 54455 checklistsDec 1-7: 2.7% of 40166 checklistsDec 8-14: 2.7% of 41035 checklistsDec 15-21: 1.9% of 46983 checklistsDec 22-31: 2.5% of 73015 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 Texas 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 Texas

Best counties

Share of checklists at the peak
  1. Dimmit CountyBest late July · 13 checklists that week, 576 in all43%
  2. La Salle CountyBest late November · 47 checklists that week, 1,171 in all36%
  3. Duval CountyBest mid January · 27 checklists that week, 1,580 in all34%
  4. Jim Hogg CountyBest mid October · 28 checklists that week, 1,125 in all26%
  5. McMullen CountyBest mid September · 33 checklists that week, 3,965 in all26%
  6. Zapata CountyBest mid November · 99 checklists that week, 3,836 in all25%

Best spots

Share of checklists at the peak
  1. Lower Rio Grande Valley National Wildlife Refuge (Palmito Hill)Cameron County, best the second week of November · 23 checklists that week, 124 in all77%
  2. Bentsen - Rio Grande Valley State Park (south)Hidalgo County, best the second week of October · 89 checklists that week, 2,096 in all67%
  3. Laguna Atascosa National Wildlife Refuge (north 4)Cameron County, best late December · 27 checklists that week, 618 in all65%
  4. McAllen Botanical Garden and Nature CenterHidalgo County, best late December · 56 checklists that week, 1,187 in all62%

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

Best time of day

In Texas, the Harris's Hawk is most often listed on checklists started between 7 and 9 am (2.2% of those checklists).

0%1%2%3%12 am: too few checklists (898) to judge1 am: too few checklists (756) to judge2 am: too few checklists (663) to judge3 am: too few checklists (741) to judge4 am: too few checklists (1537) to judge5 am: too few checklists (6113) to judge6 am: 1.1% of 74687 checklists7 am: 1.8% of 285131 checklists8 am: 2.4% of 329960 checklists9 am: 1.6% of 267889 checklists10 am: 1.6% of 218205 checklists11 am: 1.5% of 178879 checklists12 pm: 1.4% of 153722 checklists1 pm: 1.6% of 144662 checklists2 pm: 1.8% of 138578 checklists3 pm: 1.5% of 136878 checklists4 pm: 1.4% of 137550 checklists5 pm: 1.2% of 113599 checklists6 pm: 0.8% of 81743 checklists7 pm: 0.7% of 53396 checklists8 pm: too few checklists (17221) to judge9 pm: too few checklists (4048) to judge10 pm: too few checklists (1965) to judge11 pm: too few checklists (990) 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
January2.6%2.7%2.6%2.5%
February2.5%2.5%1.9%2.4%
March2.1%2.4%2.1%1.5%
April1.3%1.2%1.1%0.9%
May0.7%0.4%0.5%0.5%
June0.5%0.5%0.4%0.6%
July0.5%0.4%0.5%0.6%
August0.6%0.5%0.6%0.7%
September0.9%0.8%1.1%1.2%
October1.3%1.1%1.3%1.7%
November3.6%4.7%2.6%2.3%
December2.7%2.7%1.9%2.5%

Neighboring states

  • Arizona: arrives late June, 11 weeks earlier than Texas

Common questions

When do Harris's Hawks arrive in Texas?
Harris's Hawks are winter birds in Texas: the first arrive in mid September, they are common by late September, peak in the second week of November (3.7% of checklists), and most are gone by the second week of April.
When do Harris's Hawks leave Texas?
Most Harris's Hawks have left Texas by the second week of April, when reports fall below half their usual rate. Stragglers are still reported until mid April.
When is the best time to see a Harris's Hawk in Texas?
The Harris's Hawk is reported most often in the second week of November, on about 3.7% of Texas checklists.
Where in Texas are Harris's Hawks seen most often?
By county, Dimmit County, La Salle County, and Duval County have the highest peak reporting rates for the Harris's Hawk (counties with at least 200 checklists).