Synallaxis cinerascens
The Grey-bellied Spinetail (Synallaxis cinerascens) is a rather nondescript yet distinctive member of the Furnariidae family, a diverse group known for their often elaborate nests. Measuring approximately 14-15 cm (5.5-6 inches) in length, this small passerine exhibits a primarily grey belly that contrasts subtly with its olive-brownish back and cap. A key identification feature is the prominent rufous coloration on its wing coverts and outer tail feathers, which can be surprisingly vibrant i...
Found primarily in the dense understory of humid lowland and foothill forests, often favoring areas with bamboo thickets or near water sources, typically at elevations up to 1000 meters.
Primarily insectivorous, feeding on a variety of small arthropods including insects (e.g., beetles, ants, caterpillars) and spiders, which it gleans from foliage and bark.
The Grey-bellied Spinetail is a highly secretive and skulking bird, spending most of its time hidden deep within dense vegetation, making it more frequently heard than seen. It is a diurnal species that forages by gleaning small arthropods from leaves, twigs, and bark, methodically working its wa...
The Grey-bellied Spinetail is a resident species with a relatively restricted but contiguous distribution across parts of south-central South America. Its breeding and year-round range extends from southern Bolivia, through western and central Paraguay, into northeastern Argentina, primarily in t...
Least Concern
- The Grey-bellied Spinetail is renowned for constructing a truly remarkable, enclosed stick nest, often resembling a thorny sphere with a hidden entrance. - Its nests can be surprisingly large relative to the bird's small size, providing excellent protection against predators. - Despite its drab...