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Beautiful Treerunner Margarornis bellulus

Justification
This species is listed as Near Threatened because it has an extremely small range, in which it is potentially threatened by the clearance and degradation of its habitat in the near future. Habitat at the elevational range occupied by this species is not thought to be seriously threatened at present. However, the species might qualify for uplisting to a higher threat category if it is found that threats to lowland forest are extending into higher elevations.

Taxonomic source(s)
AOU. 1998. Check-list of North American birds. American Ornithologists' Union, Washington, D.C.
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.
Stotz, D. F.; Fitzpatrick, J. W.; Parker, T. A.; Moskovits, D. K. 1996. Neotropical birds: ecology and conservation. University of Chicago Press, Chicago.

Distribution and population
Margarornis bellulus has a restricted distribution in the highlands of east Panama, where it is rare on Cerro Quía and in the Jungurudó, Pirre, Tacarcuna and Majé mountain ranges (Wetmore 1972, Robbins et al. 1985, Ridgely and Gwynne 1989, Wege 1996, Angehr and Jordán 1998, G. R. Angehr in litt. 1998).

Population justification
The global population size has not been quantified, but this species is described as 'uncommon' (Stotz et al. 1996).

Trend justification
The population is suspected to be stable in the absence of evidence for any declines or substantial threats.

Ecology
This species inhabits montane cloud forest on summits and higher ridges, mostly at 1,350-1,600 m, but to 900 m on Cerro Quía (Ridgely and Gwynne 1989, Wege 1996). It feeds on arthropods, gleaning prey from branches and epiphytic vegetation, mostly in the subcanopy (del Hoyo et al. 2003).

Threats
Habitat in the region is being cleared and degraded for mining, agriculture and cultivation of coca (Wege 1996), but probably not yet within the altitudinal range of this species. Completion of the Pan-American Highway link through Darién could be highly detrimental to this species (Wege 1996).

Conservation Actions Underway
The Serranía de Majé is unprotected, but the remainder of the species's range falls within the Darién National Park (IUCN 1992, Wege 1996). However, this legal designation has not halted habitat loss (Wege 1996). Conservation Actions Proposed
Conduct surveys to assess the total population size. Carry out regular surveys to monitor population trends. Monitor rates of habitat loss and degradation within the species's range. Improve the management (effective habitat protection) of Darién National Park.

References
Angehr, G. R.; Jordan, O. 1998. Report on the Panama Important Bird Areas program. Panama Audubon Society/BirdLife International, Ancon, Panamá.

del Hoyo, J.; Elliott, A.; Christie, D. 2003. Handbook of the Birds of the World, vol. 8: Broadbills to Tapaculos. Lynx Edicions, Barcelona, Spain.

IUCN. 1992. Protected areas of the world: a review of national systems. International Union for Conservation of Nature and Natural Resources, Gland, Switzerland and Cambridge, U.K.

Ridgely, R. S.; Gwynne, J. A. 1989. A guide to the birds of Panama with Costa Rica, Nicaragua, and Honduras. Princeton University Press, Princeton.

Robbins, M. B.; Parker, T. A.; Allen, S. E. 1985. The avifauna of Cerro Pirre, Darién, eastern Panama. In: Buckley, P.A. (ed.), Neotropical Ornothology, pp. 198-232. American Ornithologist's Union, Washington D.C.

Stotz, D. F.; Fitzpatrick, J. W.; Parker, T. A.; Moskovits, D. K. 1996. Neotropical birds: ecology and conservation. University of Chicago Press, Chicago.

Wege, D. C. 1996. Threatened birds of the Darién Highland, Panama: a reassessment. Bird Conservation International 6: 191-195.

Wetmore, A. 1972. The birds of the Republic of Panama. Part 3: Dendrocolaptidae to Oxyruncidae. Smithsonian Institute, Washington, D.C.

Text account compilers
Isherwood, I., O'Brien, A., Sharpe, C J, Taylor, J.

Contributors
Angehr, G.

IUCN Red List evaluators
Butchart, S., Symes, A.

Recommended citation
BirdLife International (2014) Species factsheet: Margarornis bellulus. Downloaded from http://www.birdlife.org on 17/04/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 17/04/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Additional resources for this species

ARKive species - Beautiful treerunner (Margarornis bellulus) 0

Key facts
Current IUCN Red List category Near Threatened
Family Furnariidae (Ovenbirds)
Species name author Nelson, 1912
Population size Unknown mature individuals
Population trend Stable
Distribution size (breeding/resident) 220 km2
Country endemic? Yes
Links to further information
- Additional Information on this species