Family Ovenbirds (Furnariidae)

Near Threatened

Beautiful Treerunner (Margarornis bellulus)


French: Anabasitte superbe German: Fleckenbrust-Stachelschwanz Spanish: Subepalo bonito

Margarornis bellulus


, 1912,

Cerro Pirre, 4500 feet [c. 1370 m], near head of Río Limón, Darién, Panama


Has been thought probably conspecific with M. squamiger, but differs in its larger bill (effect size 4.5, score 2); clearly shorter wing than M. squamiger perlatus, the geographically closest taxon (effect size −2.19, score 2); smaller, less extensive spots on underparts (2); and olive-tinged red-brown vs bright rufous mantle, back, scapulars, wing-coverts and rump (2). Monotypic.


Serranía de Majé (E Panamá Province), and Cerro Tacarcuna, Cerro Mali, Cerro Pirre, Altos de Quía and Serranía de Jungurudó#R, in extreme E Panama.

Descriptive notes

14–15 cm; 18–19 g. Has buffish-white supercilium extending from supraloral region back to collar, dull reddish-brown postocular line, dark brown auriculars... read more


A short trill has been heard.


Montane evergreen forest, at 1350–1600 m; rarely to 900 m.

Food and feeding

Arthropods. Usually seen in mixed-species flocks. Scansorial; also highly acrobatic, often foraging upside-down on undersides of branches.... read more


No information.



Status and conservation

Not globally threatened. Currently considered Near Threatened. Restricted-range species: present in Darién Highlands EBA. Total range (Extent of Occurrence) 220 km2.... read more

Recommended citation

Remsen, J.V., Jr & Sharpe, C.J. (2020). Beautiful Treerunner (Margarornis bellulus). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 26 February 2020).