Oceanodroma tethys
Silhouette: Richard Crossley · PhyloPic
In 3 days ~50% in a week ~80%
The wedge-rumped storm petrel (Hydrobates tethys) is a storm petrel. It breeds in the Galápagos Islands and on the coast of Peru. It was formerly defined in the genus Oceanodroma before that genus was synonymized with Hydrobates.
Wedge-rumped storm-petrel [Oceanodroma tethys] - photos, Christopher Taylor Nature Photography Wikipedia →
Recording
© Fabrice Schmitt · XCXC871491 · CC BY-NC-SA 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Galápagos Islands | 🇪🇨 Ecuador | |
| 2 | Isla del Coco National Park | 🇨🇷 Costa Rica | |
| 3 | Coiba National Park | 🇵🇦 Panama | |
| 4 | Cabo Blanco Absolute Nature Reserve | 🇨🇷 Costa Rica | |
| 5 | Cabo Pulmo National Park | 🇲🇽 Mexico | |
| 6 | Machalilla National Park | 🇪🇨 Ecuador | |
| 7 | Corcovado National Park | 🇨🇷 Costa Rica | |
| 8 | Manuel Antonio National Park | 🇨🇷 Costa Rica |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Los Angeles | 🇺🇸 United States |
Possible
About 20% of wildlife watchers report a Wedge-rumped Storm-Petrel sighting in Galápagos Islands on a given day, based on 2,442 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 36th most-seen of the 114 birds we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
June
In that month about 40% of wildlife watchers report a Wedge-rumped Storm-Petrel in Galápagos Islands on a given day, against about 10% in November to February, the lowest months. That is one of Galápagos Islands's driest months, with almost no rain against 50 mm in March.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Wedge-rumped Storm-Petrel sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 8 parks where we can rate Wedge-rumped Storm-Petrel sightings, Galápagos Islands has the highest daily chance: about 20%. Next come Isla del Coco National Park (Costa Rica, about 10%) and Coiba National Park (Panama, about 10%).
GBIF citizen-science records
It is estimated from how often the Wedge-rumped Storm-Petrel is recorded against all the birds logged in Galápagos Islands (2,442 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.
