Stilpnia argyrofenges
The Straw-backed Tanager (Stilpnia argyrofenges), a diminutive jewel of the Andean cloud forests, is easily recognized by its striking pale straw-yellow or whitish back and rump, which starkly contrasts with its otherwise often muted plumage. Measuring approximately 12.5-13.5 cm (5 inches) in length and weighing around 12-18 grams, this small passerine typically exhibits a bluish-gray to olive crown and nape, with darker wings and tail often edged in blue or green. Its underparts are generall...
Primarily inhabits humid montane forests, cloud forests, and their edges, as well as secondary growth and stunted woodland (elfin forest) at elevations typically ranging from 1,400 to 2,800 meters (4,600 to 9,200 feet).
Its diet consists primarily of small arthropods, including insects and spiders, which it gleans from foliage and bark, supplemented by small berries and fruits.
Straw-backed Tanagers are highly active, diurnal birds, frequently observed participating in bustling mixed-species foraging flocks, particularly in the mid to upper strata of the forest canopy. They move constantly through foliage, gleaning insects and small fruits with agility, often hanging up...
The Straw-backed Tanager is endemic to the humid montane forests of the central and northern Andes of South America, with a disjunct distribution. Its primary range extends from southeastern Colombia through eastern Ecuador and eastern Peru, south into central Bolivia. Two recognized subspecies e...
Least Concern
- The Straw-backed Tanager's most distinctive feature, its pale straw-yellow back, is surprisingly unique among South American tanagers, making identification relatively straightforward despite its small size. - It is an ardent participant in mixed-species foraging flocks, often joining groups of...