Sousa teuszii
In 3 days ~40% in a week ~70%
The Atlantic humpback dolphin (Sousa teuszii) is a species of humpback dolphin that is found in coastal areas of West Africa. It is regarded as critically endangered by the IUCN. Apart from its geographical range, it can be distinguishable from the Indo-Pacific humpback because of their distinct skin coloration and other morphological characteristics. Atlantic humpbacks have a gray or white color, unlike the Indo-Pacific humpbacks which have pink mottling. Males, in particular, can have distinct humps under their dorsal fins. They can also be distinguished by a robust body with a well-defined rostrum. They are typically slate gray on the back and sides, fading to light gray ventrally. The dorsal fin is small, slightly falcate, and triangular, and sits on a distinctive and well developed dorsal hump.
Atlantic humpbacks can also be distinguishable from the other species (S. plumbea, S. chinensis, S. sahulensis sp. nov., etc.) because of a significantly lower number of teeth. On average, they have about 30 teeth per row versus other species having around 33–37. To complement this, they typically have a shorter and wider skull than the other species.
At birth, this species...
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Saloum Delta National Park | 🇸🇳 Senegal |
More parks will be added in future updates.
No species of the same family or order lives in Saloum Delta National Park, so these are its closest relatives here: other mammals.
Possible
About 20% of wildlife watchers report an Atlantic Humpbacked Dolphin sighting in Saloum Delta National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
June
In that month about 50% of wildlife watchers report an Atlantic Humpbacked Dolphin in Saloum Delta National Park on a given day, against under 5% in January, March–April and August–November, the lowest months. That is one of Saloum Delta National Park's driest months, with about 15 mm of rain against 250 mm in August.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Atlantic Humpbacked Dolphin sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Saloum Delta National Park, in our data
Saloum Delta National Park is the only park on Wallace's Line with enough records to rate Atlantic Humpbacked Dolphin sightings: about 20% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Atlantic Humpbacked Dolphin is recorded against all the mammals logged in Saloum Delta National Park (10 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.
