Margarornis squamiger
Silhouette: Sheatherius · PhyloPic
In 3 days <5%
The pearled treerunner (Margarornis squamiger) is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Bolivia, Colombia, Ecuador, Peru, Venezuela, and possibly Argentina. The pearled treerunner is 15 to 16 cm (5.9 to 6.3 in) long and weighs 14 to 19 g (0.49 to 0.67 oz). The sexes have the same plumage. Adults of the nominate subspecies have a well-defined yellowish buff supercilium that extends to the nape, a dull reddish brown line behind the eye, dull yellowish buff and dark brown ear coverts, and a dark brown moustacial area with tiny whitish spots that become streaks to the rear. Their forehead is dark brownish with pale rufous streaks and their crown dark reddish brown. Their collar is dull rufescent brown with black-outlined yellowish buff streaks. Their back, rump, and uppertail coverts are bright reddish brown. Their wing coverts are bright reddish brown, their primary coverts dark fuscous brown, and their flight... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Chingaza National Natural Park | 🇨🇴 Colombia | |
| 2 | Podocarpus National Park | 🇪🇨 Ecuador | |
| 3 | Los Nevados National Natural Park | 🇨🇴 Colombia | |
| 4 | Farallones de Cali National Natural Park | 🇨🇴 Colombia |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Quito | 🇪🇨 Ecuador |
Rare
Under 5% of wildlife watchers report a Pearled Treerunner sighting in Farallones de Cali National Natural Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 438th most-seen of the 542 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 Pearled Treerunner in Farallones de Cali National Natural Park on a given day, so our monthly data shows no clear season.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Pearled Treerunner sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 4
Of the 4 parks where we can rate Pearled Treerunner sightings, Farallones de Cali National Natural Park ranks 4th at under 5%. The best odds are in Chingaza National Natural Park (Colombia, about 30%), Podocarpus National Park (Ecuador, about 30%) and Los Nevados National Natural Park (Colombia, about 10%).
Same family: Furnariidae
The closest relatives of the Pearled Treerunner that you can see in Farallones de Cali National Natural Park (family Furnariidae, Ovenbirds and Woodcreepers) are Red-faced Spinetail (about 50%), Montane Woodcreeper (about 10%) and Azara's Spinetail (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Pearled Treerunner is recorded against all the birds logged in Farallones de Cali National Natural 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.
