Oceanodroma hornbyi
Silhouette: Richard Crossley · PhyloPic
In 3 days <5%
The ringed storm petrel (Hydrobates hornbyi), also known as Hornby's storm petrel, is a seabird that ranges in the Humboldt Current off the coasts of South America. The species is a very distinctive member of the storm petrel family, with a dark cap, white face and underparts, forked tail and a black band across the chest. It is relatively common in the seas off Peru, Chile and Ecuador. The species is named after Admiral Sir Phipps Hornby.
The ringed storm petrel was formally described in 1854 by the English zoologist George Gray and given the binomial name Thalassidroma hornbyi. He chose the specific epithet to honour Admiral Sir Phipps Hornby who had obtained the specimen. The ringed storm petrel was formerly placed in the genus Oceanodroma but is now placed in the genus Hydrobates, the only genus in the Northern storm petrel family Hydrobatidae.
Little is known about the breeding biology of the ringed storm petrel. The first colony of this seabird ever found was discovered in April 2017 by Chilean ornithologists from the Red de Observadores de Aves y Vida Silvestre de Chile (ROC). Breeding burrows of this seabirds were discovered in the Atacama Desert... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Lima | 🇵🇪 Peru |
Rare
Under 5% of wildlife watchers report a Hornby's Storm Petrel sighting in Lima on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 168th most-seen of the 171 birds we can rate there. Over three days the chance rises to under 5%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Hornby's Storm Petrel in Lima on a given day, so our monthly data shows no clear season.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Hornby's 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.
Only Lima, in our data
Lima is the only city on Wallace's Line with enough records to rate Hornby's Storm Petrel sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Hornby's Storm Petrel is recorded against all the birds logged in Lima (9 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.
