WhenToBird

Polioptila caerulea · Polioptilidae

When Do Blue-gray Gnatcatchers Arrive in South Carolina?

Adult Blue-gray Gnatcatcher
Photo: Laura Clark, CC BY 4.0 via iNaturalist

Blue-gray Gnatcatchers reach South Carolina in late February, are common by the second week of March, peak in the second week of April (36% of checklists), and most are gone by mid September.

When to look

First arrivalsFeb 22-28late February
Common byMar 8-14the second week of March
PeakApr 8-14the second week of April
Most gone bySep 15-21mid September

Best: the second week of April. First arrivals late February; most are gone by mid September. Peak: on about 36% of South Carolina checklists.

  1. Janrare
  2. Febrare
  3. Marpeak season
  4. Aprpeak season
  5. Maypeak season
  6. Juncommon
  7. Julcommon
  8. Augcommon
  9. Sepcommon
  10. Octuncommon
  11. Novrare
  12. Decrare

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

0%10%20%30%40%Jan 1-7: 3.4% of 15487 checklistsJan 8-14: 2.2% of 11691 checklistsJan 15-21: 2.2% of 11994 checklistsJan 22-31: 1.9% of 16225 checklistsFeb 1-7: 1.8% of 12192 checklistsFeb 8-14: 1.4% of 14044 checklistsFeb 15-21: 1.4% of 18483 checklistsFeb 22-28: 3.1% of 12045 checklistsMar 1-7: 9.1% of 11511 checklistsMar 8-14: 17% of 11704 checklistsMar 15-21: 23% of 11526 checklistsMar 22-31: 31% of 17386 checklistsApr 1-7: 36% of 13148 checklistsApr 8-14: 35% of 13193 checklistsApr 15-21: 36% of 13936 checklistsApr 22-30: 35% of 19002 checklistsMay 1-7: 33% of 14133 checklistsMay 8-14: 30% of 13668 checklistsMay 15-21: 29% of 11064 checklistsMay 22-31: 27% of 14461 checklistsJun 1-7: 26% of 10231 checklistsJun 8-14: 24% of 9417 checklistsJun 15-21: 24% of 8012 checklistsJun 22-30: 23% of 9720 checklistsJul 1-7: 21% of 7907 checklistsJul 8-14: 19% of 7338 checklistsJul 15-21: 19% of 7312 checklistsJul 22-31: 19% of 10877 checklistsAug 1-7: 18% of 7816 checklistsAug 8-14: 19% of 7655 checklistsAug 15-21: 19% of 7797 checklistsAug 22-31: 21% of 11246 checklistsSep 1-7: 20% of 8956 checklistsSep 8-14: 17% of 8929 checklistsSep 15-21: 15% of 9389 checklistsSep 22-30: 11% of 13028 checklistsOct 1-7: 7.8% of 11063 checklistsOct 8-14: 5.8% of 10968 checklistsOct 15-21: 6.5% of 10264 checklistsOct 22-31: 5.2% of 12917 checklistsNov 1-7: 4.7% of 8802 checklistsNov 8-14: 4.0% of 8339 checklistsNov 15-21: 3.9% of 8798 checklistsNov 22-30: 3.7% of 12925 checklistsDec 1-7: 3.6% of 8541 checklistsDec 8-14: 3.2% of 8609 checklistsDec 15-21: 3.4% of 9961 checklistsDec 22-31: 3.0% of 17541 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 South Carolina 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 South Carolina

Best counties

Share of checklists at the peak
  1. Bamberg CountyBest early May · 14 checklists that week, 642 in all70%
  2. Marion CountyBest mid April · 16 checklists that week, 327 in all69%
  3. Union CountyBest early July · 13 checklists that week, 851 in all67%
  4. Chester CountyBest late May · 57 checklists that week, 921 in all67%
  5. Hampton CountyBest mid April · 37 checklists that week, 1,038 in all64%
  6. Chesterfield CountyBest the second week of April · 71 checklists that week, 1,880 in all62%

Best spots

Share of checklists at the peak
  1. Bluehouse SwampCharleston County, best early April · 20 checklists that week, 501 in all100%
  2. Barnwell State ParkBarnwell County, best late March · 23 checklists that week, 181 in all94%
  3. Cox Ferry LakeHorry County, best late March · 51 checklists that week, 1,304 in all93%
  4. Old Santee Canal ParkBerkeley County, best mid March · 34 checklists that week, 1,615 in all93%
  5. Scotts Lake (historical)Clarendon County, best late August · 28 checklists that week, 1,963 in all91%

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

Best time of day

In South Carolina, the Blue-gray Gnatcatcher is most often listed on checklists started between 6 and 8 am (23% of those checklists).

0%10%20%30%12 am: too few checklists (222) to judge1 am: too few checklists (160) to judge2 am: too few checklists (132) to judge3 am: too few checklists (212) to judge4 am: too few checklists (267) to judge5 am: too few checklists (1898) to judge6 am: 27% of 19280 checklists7 am: 22% of 66492 checklists8 am: 19% of 73941 checklists9 am: 17% of 63039 checklists10 am: 15% of 52652 checklists11 am: 13% of 41908 checklists12 pm: 12% of 36782 checklists1 pm: 12% of 33300 checklists2 pm: 11% of 32248 checklists3 pm: 10% of 35451 checklists4 pm: 10% of 34410 checklists5 pm: 12% of 27073 checklists6 pm: 14% of 17375 checklists7 pm: too few checklists (10313) to judge8 pm: too few checklists (2756) to judge9 pm: too few checklists (672) to judge10 pm: too few checklists (412) to judge11 pm: too few checklists (256) 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
January3.4%2.2%2.2%1.9%
February1.8%1.4%1.4%3.1%
March9.1%17%23%31%
April36%35%36%35%
May33%30%29%27%
June26%24%24%23%
July21%19%19%19%
August18%19%19%21%
September20%17%15%11%
October7.8%5.8%6.5%5.2%
November4.7%4.0%3.9%3.7%
December3.6%3.2%3.4%3.0%

Neighboring states

  • North Carolina: arrives the second week of March, 2 weeks later than South Carolina
  • Georgia: arrives late February, in the same week than South Carolina
  • Tennessee: arrives mid March, 3 weeks later than South Carolina
  • Virginia: arrives mid March, 3 weeks later than South Carolina

Common questions

When do Blue-gray Gnatcatchers arrive in South Carolina?
Blue-gray Gnatcatchers reach South Carolina in late February, are common by the second week of March, peak in the second week of April (36% of checklists), and most are gone by mid September.
When do Blue-gray Gnatcatchers leave South Carolina?
Most Blue-gray Gnatcatchers have left South Carolina by mid September, when reports fall below half their usual rate. Stragglers are still reported until the second week of January.
When is the best time to see a Blue-gray Gnatcatcher in South Carolina?
The Blue-gray Gnatcatcher is reported most often in the second week of April, on about 36% of South Carolina checklists.
Where in South Carolina are Blue-gray Gnatcatchers seen most often?
By county, Bamberg County, Marion County, and Union County have the highest peak reporting rates for the Blue-gray Gnatcatcher (counties with at least 200 checklists).