Muscisaxicola albilora
Silhouette: Emily Willoughby · PhyloPic
In 3 days <5% in a week ~10%
The white-browed ground tyrant (Muscisaxicola albilora) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Argentina, Bolivia, Chile, Ecuador, and Peru, and as a vagrant to Colombia, Uruguay, and the Falkland Islands.
The white-browed ground tyrant is monotypic. However, the authors of an early twentieth century publication suggested possibly treating M. juninensis (then the Junin ground-tyrant, now the puna ground tyrant) as a subspecies of it.
The white-browed ground tyrant is 15 to 17.5 cm (5.9 to 6.9 in) long and weighs about 25 to 29 g (0.88 to 1.0 oz). The sexes have the same plumage. Adults have a tawny forecrown, a rufous hindcrown, and a long thin white supercilium. Their upperparts are brownish gray. Their wings are dusky gray. Their tail is black with whitish edges on the outer webs of the outermost feathers. Their throat, breast, and belly are pale gray and their crissum whitish. They have a dark brown iris, a long dusky bill, and dusky legs and feet. Juveniles have a brown crown, dull rufous edges on the wing coverts, and light streaking on the breast and belly. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Torres del Paine National Park | 🇨🇱 Chile | |
| 2 | Nahuel Huapi National Park | 🇦🇷 Argentina |
Rare
Under 5% of wildlife watchers report a White-browed Ground-Tyrant sighting in Nahuel Huapi National Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 90th most-seen of the 111 birds we can rate there. Over three days the chance rises to under 5%, and over a week to about 10%, if each day is a fresh chance.
October
In that month about 10% of wildlife watchers report a White-browed Ground-Tyrant in Nahuel Huapi National Park on a given day, against under 5% in November to September, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most White-browed Ground-Tyrant sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 2 parks where we can rate White-browed Ground-Tyrant sightings, Nahuel Huapi National Park ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Torres del Paine National Park (Chile, under 5%).
GBIF citizen-science records
It is estimated from how often the White-browed Ground-Tyrant is recorded against all the birds logged in Nahuel Huapi National Park (15 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.
