WhenToBird

Mergus serrator · Anatidae

When Do Red-breasted Mergansers Arrive in Florida?

Adult male Red-breasted Merganser
Photo: Peter Chen 2.0, CC BY 4.0 via iNaturalist

Red-breasted Mergansers are winter birds in Florida: they arrive in mid November, peak in mid December (3.6% of checklists), and most are gone by mid April.

When to look

First arrivalsNov 15-21mid November
Common byNov 15-21mid November
PeakDec 15-21mid December
Most gone byApr 15-21mid April

Best: mid December. First arrivals mid November; most are gone by mid April. Peak: on about 3.6% of Florida checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marpeak season
  4. Aprcommon
  5. Mayuncommon
  6. Junrare
  7. Julnot usually seen
  8. Augnot usually seen
  9. Sepnot usually seen
  10. Octnot usually seen
  11. Novcommon
  12. Decpeak season

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

0%1%2%3%4%Jan 1-7: 3.4% of 74446 checklistsJan 8-14: 3.5% of 60074 checklistsJan 15-21: 3.0% of 62945 checklistsJan 22-31: 2.9% of 84954 checklistsFeb 1-7: 2.9% of 59204 checklistsFeb 8-14: 2.8% of 63259 checklistsFeb 15-21: 2.5% of 77150 checklistsFeb 22-28: 2.7% of 62850 checklistsMar 1-7: 2.8% of 58560 checklistsMar 8-14: 2.9% of 57756 checklistsMar 15-21: 3.0% of 54898 checklistsMar 22-31: 2.8% of 76702 checklistsApr 1-7: 2.6% of 55096 checklistsApr 8-14: 2.3% of 55892 checklistsApr 15-21: 1.8% of 59358 checklistsApr 22-30: 1.3% of 73124 checklistsMay 1-7: 0.9% of 47915 checklistsMay 8-14: 0.8% of 44114 checklistsMay 15-21: 0.5% of 31858 checklistsMay 22-31: 0.5% of 40723 checklistsJun 1-7: 0.2% of 31668 checklistsJun 8-14: 0.2% of 27802 checklistsJun 15-21: 0.1% of 26698 checklistsJun 22-30: 0.1% of 32346 checklistsJul 1-7: 0.1% of 23826 checklistsJul 8-14: 0.1% of 23071 checklistsJul 15-21: 0.1% of 22903 checklistsJul 22-31: 0.1% of 32952 checklistsAug 1-7: 0.1% of 25093 checklistsAug 8-14: 0% of 24888 checklistsAug 15-21: 0.1% of 26030 checklistsAug 22-31: 0.1% of 38612 checklistsSep 1-7: 0.1% of 31023 checklistsSep 8-14: 0.1% of 30022 checklistsSep 15-21: 0.1% of 31611 checklistsSep 22-30: 0% of 42108 checklistsOct 1-7: 0.1% of 36219 checklistsOct 8-14: 0.1% of 43113 checklistsOct 15-21: 0.1% of 40987 checklistsOct 22-31: 0.1% of 53457 checklistsNov 1-7: 0.1% of 38587 checklistsNov 8-14: 0.8% of 39208 checklistsNov 15-21: 1.8% of 39729 checklistsNov 22-30: 2.8% of 54965 checklistsDec 1-7: 3.2% of 42070 checklistsDec 8-14: 3.7% of 43424 checklistsDec 15-21: 3.6% of 50581 checklistsDec 22-31: 3.5% of 82405 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 Florida 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 Florida

Best counties

Share of checklists at the peak
  1. Taylor CountyBest the second week of March · 31 checklists that week, 1,937 in all32%
  2. Gulf CountyBest the second week of January · 131 checklists that week, 5,038 in all25%
  3. Santa Rosa CountyBest early January · 343 checklists that week, 15,001 in all21%
  4. Dixie CountyBest early April · 33 checklists that week, 2,113 in all21%
  5. Escambia CountyBest late January · 756 checklists that week, 25,457 in all15%
  6. Wakulla CountyBest early January · 1497 checklists that week, 27,521 in all12%

Best spots

Share of checklists at the peak
  1. Tom Renick ParkVolusia County, best early December · 47 checklists that week, 1,941 in all71%
  2. Skyway Fishing Pier State ParkPinellas County, best early January · 30 checklists that week, 312 in all69%
  3. Nora Patterson Bay Island Park (South)Sarasota County, best late December · 23 checklists that week, 221 in all69%
  4. Robert J Strickland Memorial ParkPasco County, best early January · 38 checklists that week, 996 in all69%
  5. Leffis KeyManatee County, best the second week of February · 30 checklists that week, 2,515 in all68%
  6. Fort George InletDuval County, best mid January · 112 checklists that week, 3,199 in all68%

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

Best time of day

In Florida, the Red-breasted Merganser is most often listed on checklists started between 7 and 9 am (2.1% of those checklists).

0%1%2%3%12 am: too few checklists (771) to judge1 am: too few checklists (771) to judge2 am: too few checklists (701) to judge3 am: too few checklists (752) to judge4 am: too few checklists (1378) to judge5 am: too few checklists (9462) to judge6 am: 1.7% of 94591 checklists7 am: 2.1% of 296183 checklists8 am: 2.1% of 319987 checklists9 am: 2.0% of 254830 checklists10 am: 2.0% of 209480 checklists11 am: 1.9% of 163924 checklists12 pm: 1.8% of 133478 checklists1 pm: 1.8% of 125012 checklists2 pm: 1.8% of 125299 checklists3 pm: 1.8% of 131072 checklists4 pm: 1.3% of 134410 checklists5 pm: 0.8% of 113373 checklists6 pm: 0.5% of 69886 checklists7 pm: too few checklists (37509) to judge8 pm: too few checklists (8966) to judge9 pm: too few checklists (2093) to judge10 pm: too few checklists (1485) to judge11 pm: too few checklists (862) 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%3.5%3.0%2.9%
February2.9%2.8%2.5%2.7%
March2.8%2.9%3.0%2.8%
April2.6%2.3%1.8%1.3%
May0.9%0.8%0.5%0.5%
June0.2%0.2%0.1%0.1%
July0.1%0.1%0.1%0.1%
August0.1%0%0.1%0.1%
September0.1%0.1%0.1%0%
October0.1%0.1%0.1%0.1%
November0.1%0.8%1.8%2.8%
December3.2%3.7%3.6%3.5%

Neighboring states

  • Georgia: arrives the second week of November, 1 week earlier than Florida
  • South Carolina: arrives mid November, in the same week than Florida
  • Alabama: arrives mid November, in the same week than Florida
  • Mississippi: arrives the second week of November, 1 week earlier than Florida

Common questions

When do Red-breasted Mergansers arrive in Florida?
Red-breasted Mergansers are winter birds in Florida: they arrive in mid November, peak in mid December (3.6% of checklists), and most are gone by mid April.
When do Red-breasted Mergansers leave Florida?
Most Red-breasted Mergansers have left Florida by mid April, when reports fall below half their usual rate. Stragglers are still reported until early May.
When is the best time to see a Red-breasted Merganser in Florida?
The Red-breasted Merganser is reported most often in mid December, on about 3.6% of Florida checklists.
Where in Florida are Red-breasted Mergansers seen most often?
By county, Taylor County, Gulf County, and Santa Rosa County have the highest peak reporting rates for the Red-breasted Merganser (counties with at least 200 checklists).