WhenToBird

Numenius americanus · Scolopacidae

When Do Long-billed Curlews Arrive in California?

Adult Long-billed Curlew
Photo: Timothy McNitt, CC BY 4.0 via iNaturalist

Long-billed Curlews reach California in mid June, are common by early July, peak in the second week of August (7.1% of checklists), and most are gone by late March.

When to look

First arrivalsJun 15-21mid June
Common byJul 1-7early July
PeakAug 8-14the second week of August
Most gone byMar 22-31late March

Best: the second week of August. First arrivals mid June; most are gone by late March. Peak: on about 7.1% of California checklists.

  1. Janpeak season
  2. Febcommon
  3. Marcommon
  4. Apruncommon
  5. Mayuncommon
  6. Juncommon
  7. Julpeak season
  8. Augpeak season
  9. Seppeak season
  10. Octcommon
  11. Novpeak season
  12. Decpeak season

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

0%2%4%6%8%Jan 1-7: 5.2% of 112336 checklistsJan 8-14: 5.5% of 85518 checklistsJan 15-21: 5.7% of 86488 checklistsJan 22-31: 4.9% of 116174 checklistsFeb 1-7: 4.6% of 75171 checklistsFeb 8-14: 4.3% of 84467 checklistsFeb 15-21: 3.9% of 105683 checklistsFeb 22-28: 4.7% of 83396 checklistsMar 1-7: 4.3% of 77470 checklistsMar 8-14: 4.2% of 75180 checklistsMar 15-21: 4.1% of 80770 checklistsMar 22-31: 3.5% of 114116 checklistsApr 1-7: 2.7% of 84057 checklistsApr 8-14: 2.1% of 83692 checklistsApr 15-21: 2.0% of 89242 checklistsApr 22-30: 1.8% of 114289 checklistsMay 1-7: 1.7% of 85728 checklistsMay 8-14: 1.5% of 91984 checklistsMay 15-21: 1.2% of 75478 checklistsMay 22-31: 1.2% of 106250 checklistsJun 1-7: 1.3% of 70051 checklistsJun 8-14: 1.5% of 67485 checklistsJun 15-21: 2.0% of 66269 checklistsJun 22-30: 3.0% of 79172 checklistsJul 1-7: 4.1% of 62877 checklistsJul 8-14: 5.3% of 60328 checklistsJul 15-21: 5.8% of 59705 checklistsJul 22-31: 6.4% of 83796 checklistsAug 1-7: 6.8% of 60215 checklistsAug 8-14: 7.2% of 60172 checklistsAug 15-21: 7.1% of 59877 checklistsAug 22-31: 6.8% of 89107 checklistsSep 1-7: 6.3% of 72000 checklistsSep 8-14: 5.3% of 71228 checklistsSep 15-21: 4.6% of 76808 checklistsSep 22-30: 4.5% of 100204 checklistsOct 1-7: 4.8% of 76571 checklistsOct 8-14: 4.9% of 80874 checklistsOct 15-21: 5.0% of 74581 checklistsOct 22-31: 5.3% of 97498 checklistsNov 1-7: 5.4% of 70851 checklistsNov 8-14: 5.4% of 72431 checklistsNov 15-21: 5.4% of 66767 checklistsNov 22-30: 5.5% of 94737 checklistsDec 1-7: 5.4% of 65393 checklistsDec 8-14: 5.0% of 67449 checklistsDec 15-21: 4.2% of 83421 checklistsDec 22-31: 5.3% of 124993 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 California 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 California

Best counties

Share of checklists at the peak
  1. San Luis Obispo CountyBest the second week of August · 2076 checklists that week, 124,667 in all25%
  2. Napa CountyBest the second week of August · 283 checklists that week, 18,976 in all23%
  3. Kings CountyBest late July · 62 checklists that week, 3,688 in all21%
  4. Colusa CountyBest the second week of March · 136 checklists that week, 7,653 in all20%
  5. Alameda CountyBest the second week of August · 2561 checklists that week, 161,052 in all19%
  6. Solano CountyBest the second week of July · 331 checklists that week, 25,325 in all19%

Best spots

Share of checklists at the peak
  1. Morro Strand State BeachSan Luis Obispo County, best mid July · 40 checklists that week, 2,064 in all97%
  2. Middle Harbor Shoreline ParkAlameda County, best mid August · 56 checklists that week, 2,089 in all97%
  3. Crown Memorial Regional ShorelineAlameda County, best early August · 148 checklists that week, 3,508 in all94%
  4. San Lorenzo CreekAlameda County, best the second week of August · 35 checklists that week, 623 in all93%
  5. Bolinas Lagoon Open Space Preserve (Morses Gulch)Marin County, best the second week of August · 31 checklists that week, 874 in all90%

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

Best time of day

In California, the Long-billed Curlew is most often listed on checklists started between 1 and 3 pm (4.9% of those checklists).

0%2%4%6%12 am: too few checklists (1688) to judge1 am: too few checklists (1451) to judge2 am: too few checklists (1402) to judge3 am: too few checklists (1743) to judge4 am: too few checklists (4647) to judge5 am: too few checklists (32158) to judge6 am: 3.6% of 186053 checklists7 am: 4.2% of 444086 checklists8 am: 4.3% of 535846 checklists9 am: 4.4% of 486061 checklists10 am: 4.5% of 411130 checklists11 am: 4.6% of 325798 checklists12 pm: 4.5% of 269132 checklists1 pm: 5.0% of 244762 checklists2 pm: 4.8% of 235420 checklists3 pm: 4.7% of 232365 checklists4 pm: 4.0% of 208688 checklists5 pm: 3.6% of 146104 checklists6 pm: 2.9% of 96867 checklists7 pm: too few checklists (50942) to judge8 pm: too few checklists (14803) to judge9 pm: too few checklists (5561) to judge10 pm: too few checklists (3546) to judge11 pm: too few checklists (2092) 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
January5.2%5.5%5.7%4.9%
February4.6%4.3%3.9%4.7%
March4.3%4.2%4.1%3.5%
April2.7%2.1%2.0%1.8%
May1.7%1.5%1.2%1.2%
June1.3%1.5%2.0%3.0%
July4.1%5.3%5.8%6.4%
August6.8%7.2%7.1%6.8%
September6.3%5.3%4.6%4.5%
October4.8%4.9%5.0%5.3%
November5.4%5.4%5.4%5.5%
December5.4%5.0%4.2%5.3%

Neighboring states

  • Nevada: arrives late March, 11 weeks earlier than California
  • Utah: arrives mid March, 12 weeks earlier than California
  • Arizona: arrives the second week of June, 1 week earlier than California
  • Oregon: arrives early April, 10 weeks earlier than California

Common questions

When do Long-billed Curlews arrive in California?
Long-billed Curlews reach California in mid June, are common by early July, peak in the second week of August (7.1% of checklists), and most are gone by late March.
When do Long-billed Curlews leave California?
Most Long-billed Curlews have left California by late March, when reports fall below half their usual rate. Stragglers are still reported until early May.
When is the best time to see a Long-billed Curlew in California?
The Long-billed Curlew is reported most often in the second week of August, on about 7.1% of California checklists.
Where in California are Long-billed Curlews seen most often?
By county, San Luis Obispo County, Napa County, and Kings County have the highest peak reporting rates for the Long-billed Curlew (counties with at least 200 checklists).