Oceanodroma tethys
Silhouette: Richard Crossley · PhyloPic
In 3 days ~30% in a week ~60%
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 |
With luck
About 10% of wildlife watchers report a Wedge-rumped Storm-Petrel sighting in Isla del Coco National Park on a given day, based on 43 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 44th most-seen of the 69 birds we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
September and October
In those months about 30% of wildlife watchers report a Wedge-rumped Storm-Petrel in Isla del Coco National Park on a given day, against under 5% in April and November, the lowest months. May and July–August have too few records to rate.
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.
2nd of 8
Of the 8 parks where we can rate Wedge-rumped Storm-Petrel sightings, Isla del Coco National Park ranks 2nd at about 10%. The best odds are in Galápagos Islands (Ecuador, about 20%).
GBIF citizen-science records
It is estimated from how often the Wedge-rumped Storm-Petrel is recorded against all the birds logged in Isla del Coco National Park (43 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.
