Tursiops erebennus
Silhouette: Chris huh · PhyloPic
In 3 days ~10% in a week ~30%
Tamanend's bottlenose dolphin (Tursiops erebennus) is a species of bottlenose dolphin that inhabits coastal waters in the eastern United States. This species was previously considered a nearshore variant of the common bottlenose dolphin Tursiops truncatus.
Tursiops erebennus was first described by Edward Drinker Cope as Delphinus erebennus in 1865. The type specimen was collected from a fisherman's seine net at the Red Bank community in West Deptford Township, New Jersey. Cope identified various physical differences between T. erebennus and T. truncatus (then known as Delphinus tursio), including a smaller size, fewer vertebrae, and fewer ribs in T. erebennus. However, T. erebennus was subsequently synonymized with T. truncatus. Future studies and stock assessments instead recognized dolphins in the region as belonging to two T. truncatus ecotypes: a nearshore coastal type and an offshore type. Genetic analyses suggested that the nearshore ecotype was genetically distinct. Costa et al. (2022) compared the morphology, mitochondrial DNA, and nuclear DNA of the nearshore and offshore T. truncatus ecotypes in the western North Atlantic. They found considerable differences... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Merritt Island National Wildlife Refuge | 🇺🇸 United States | |
| 2 | Everglades National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Miami | 🇺🇸 United States | |
| 2 | New York City | 🇺🇸 United States |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Theater of the Sea | 🇺🇸 United States | |
| 2 | Miami Seaquarium | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Tamanend's Bottlenose Dolphin sighting in Everglades National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 15th most-seen of the 17 mammals we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
January, April–May and July
In those months about 10% of wildlife watchers report a Tamanend's Bottlenose Dolphin in Everglades National Park on a given day, against under 5% in February–March, June and August–December, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Tamanend's Bottlenose Dolphin sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 2
Of the 2 parks where we can rate Tamanend's Bottlenose Dolphin sightings, Everglades National Park ranks 2nd at under 5%. The best odds are in Merritt Island National Wildlife Refuge (United States, about 30%).
GBIF citizen-science records
It is estimated from how often the Tamanend's Bottlenose Dolphin is recorded against all the mammals logged in Everglades National Park (6 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
