Oceanites oceanicus
Silhouette: Mark Hannaford (photo), John E. McCormack, Michael G. Harvey, Brant C. Faircloth, Nicholas G. Crawford, Travis C. Glenn, Robb T. Brumfield & T. Michael Keesey · PhyloPic
In 3 days ~20% in a week ~40%
Wilson's storm petrel (Oceanites oceanicus), also known as Wilson's petrel, is a small seabird of the austral storm petrel family Oceanitidae. It is one of the most abundant bird species in the world and has a circumpolar distribution mainly in the seas of the southern hemisphere but extending northwards during the summer of the northern hemisphere. The world population was estimated in 2022 as stable at 8–20 million birds. In 2010 it had been estimated at 12–30 million. A 1998 book had estimated more than 50 million pairs. The name commemorates the Scottish-American ornithologist Alexander Wilson. The genus name Oceanites refers to the mythical Oceanids, the three thousand daughters of Tethys. The species name is from Latin oceanus, "ocean".
Originally described in the genus Procellaria it has been placed under the genus Oceanites. Two or three subspecies are recognized and one population maorianus from New Zealand may be extinct. The nominate population breeds from Cape Horn to the Kerguelen Islands while exasperatus breeds along the Antarctic coast in the South Shetland and other islands. The population from Tierra del Fuego was described as chilensis (=wollastoni... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Ningaloo Marine Park | 🇦🇺 Australia | |
| 2 | Acadia National Park | 🇺🇸 United States | |
| 3 | Raja Ampat | 🇮🇩 Indonesia | |
| 4 | Table Mountain National Park | 🇿🇦 South Africa | |
| 5 | Merritt Island National Wildlife Refuge | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Wilson's Storm Petrel sighting in Dakar on a given day, based on 19 verified sightings from GBIF citizen-science data. It is the 101st most-seen of the 152 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
September
In that month about 40% of wildlife watchers report a Wilson's Storm Petrel in Dakar on a given day, against under 5% in November to August, the lowest months. That is one of Dakar's wettest months, with about 170 mm of rain against almost none in May.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Wilson's Storm Petrel sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 11 cities where we can rate Wilson's Storm Petrel sightings, Dakar has the highest daily chance: about 10%. Next come Kozhikode (India, under 5%) and Kollam (India, under 5%).
GBIF citizen-science records
It is estimated from how often the Wilson's Storm Petrel is recorded against all the birds logged in Dakar (19 verified sightings), 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.
