Silhouette: Sheatherius · PhyloPic
Margarornis bellulus
In 3 days ~10% in a week ~20%
The beautiful treerunner (Margarornis bellulus) is a Near Threatened species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is endemic to Panama. Some authors have proposed that the beautiful treerunner and the pearled treerunner (M. squamiger) are conspecific or sister species, but these treatments were disproven in a 2011 publication.
The beautiful treerunner is monotypic. The beautiful treerunner is 14 to 15 cm (5.5 to 5.9 in) long and weighs 18 to 19 g (0.63 to 0.67 oz). The sexes have the same plumage. Adults have a buffish-white supercilium that extends to the nape, a dull reddish brown line behind the eye, dark brown ear coverts with whitish streaks, and a dark brown "moustache" with white spots that become stripes toward the neck. Their crown is olive brown and their upperparts and wing coverts warm olive-brown. Their flight feathers are dark fuscous with tawny-ochraceous edges. Their tail is dull reddish brown; the ends of the tail feathers lack barbs, giving a spiny appearance. Their throat is whitish and the rest of their underparts rufescent brown. Their upper breast has whitish oval spots with... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Darién National Park | 🇵🇦 Panama |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Beautiful Treerunner sighting in Darién National Park on a given day, based on 14 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 290th most-seen of the 397 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
January and February
In those months about 10% of wildlife watchers report a Beautiful Treerunner in Darién National Park on a given day, against under 5% in March to December, the lowest months. Those are among Darién National Park's driest months, with about 110 mm of rain a month against 450 mm in November.
Only Darién National Park, in our data
Darién National Park is the only park on Wallace's Line with enough records to rate Beautiful Treerunner sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Furnariidae
The closest relatives of the Beautiful Treerunner that you can see in Darién National Park (family Furnariidae, Ovenbirds and Woodcreepers) are Cocoa Woodcreeper (about 30%), Black-striped Woodcreeper (about 30%) and Wedge-billed Woodcreeper (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Beautiful Treerunner is recorded against all the birds logged in Darién National Park (14 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.
