Florida mammals

Risso's Dolphin in Florida

Grampus griseus

Native to Florida SNR Unranked in Florida

Not listed as nonindigenous in Florida by USGS NAS; native to its Florida range.

IUCN Red List status

  1. LC
  2. NT
  3. VU
  4. EN
  5. CR
  6. EW
  7. EX

LC – Least Concern

Widespread and abundant; not at risk.

Risso's Dolphin in Florida, by the numbers

Occasional in Florida 67th most recorded of 116 mammals logged in Florida

34 occurrence records

34 total records count every Florida occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 33; the monthly chart covers the 33 records with a full observation date.

When to look for the Risso's Dolphin in Florida

Most sightings fall in February.

33 Florida occurrence records (iNaturalist and GBIF) by month of year. Shows when the species is recorded, not a guarantee of presence.

Monthly Florida records (table)
MonthRecords
January4
February9
March5
April1
May4
June0
July0
August2
September3
October2
November1
December2

Monthly risso's dolphin occurrence records (iNaturalist and GBIF) in Florida.

Seasonality

Year-round in Florida, with recorded sightings peaking in February.

Occurrence map

Where Risso's Dolphin has been recorded in Florida

33 records mapped · zoom and drag to explore

29 Florida records mapped

Where it's recorded in Florida

CountyRecords
St. Johns County 4
Monroe County 3
Palm Beach County 2
Miami-Dade County 2
Martin County 2
Escambia County 1
Franklin County 1
Collier County 1
Brevard County 1
Broward County 1
Volusia County 1
Other localities 15

The complete county distribution, spread across 11 Florida counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Risso’s dolphin has only 34 documented records in Florida, all of them from GBIF’s stranding and survey data, with none posted through iNaturalist. That points to strandings and offshore surveys as the main source, not casual sightings from shore. It’s native to Florida waters, and NatureServe lists the state rank as SNR, meaning it hasn’t been formally assessed here.

February holds the highest monthly count at nine records, more than double most other months, with March next at five. With totals this small, that bump is easy to read too much into. It likely reflects a handful of stranding events more than a real seasonal push offshore.

Occurrence data from GBIF.

More mammals in Florida in the atlas

Data & sources

The data and visualizations on this page draw on these open sources:

  • GBIFCC-BY 4.0occurrence records behind the range map, elevation, and record counts
  • iNaturalistCC0 / CC-BY / CC-BY-SAobservations, photos, and audio recordings
  • NatureServe ExplorerCC-BYthe state conservation rank
  • IUCN Red Listattributed factthe global conservation status
  • USGS NASpublic domainnative / introduced status
  • Natural Earthpublic domainthe relief basemap