Oreotrochilus leucopleurus
Silhouette: Ferran Sayol · PhyloPic
In 3 days ~10%
The white-sided hillstar (Oreotrochilus leucopleurus) is a species of hummingbird in the "coquettes", tribe Lesbiini of subfamily Lesbiinae. It is found in Argentina, Bolivia, Chile. The white-sided hillstar was at one time proposed to be a subspecies of Andean hillstar (Oreotrochilus estella) but major taxonomies retain it as a species. It is monotypic.
The white-sided hillstar is 13 to 15 cm (5.1 to 5.9 in) long and weighs 7.9 to 8.4 g (0.28 to 0.30 oz). Adults have a medium length slightly decurved black bill. The adult male has drab brown upperparts. It has a shiny green gorget with a black border that separates it from the white breast and belly. The belly has a wide blue-black stripe down its middle into the vent area. The somewhat rounded tail is bronzy black and its outer feathers have white at the base. The female is also dull brown above, and below as well. Its throat is pale with fine dark speckles. The tail is greenish black and the outer three or four pairs of feathers have much white at the bases and tips. The juvenile is overall more grayish than the adult and the male has a dark blue-green gorget. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nahuel Huapi National Park | 🇦🇷 Argentina |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a White-sided Hillstar sighting in Nahuel Huapi National Park on a given day, based on 23 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 82nd most-seen of the 111 birds we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
November
In that month about 10% of wildlife watchers report a White-sided Hillstar in Nahuel Huapi National Park on a given day, against under 5% in December to October, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most White-sided Hillstar sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Nahuel Huapi National Park, in our data
Nahuel Huapi National Park is the only park on Wallace's Line with enough records to rate White-sided Hillstar sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the White-sided Hillstar is recorded against all the birds logged in Nahuel Huapi National Park (23 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.
