Cranioleuca obsoleta
The Olive Spinetail (*Cranioleuca obsoleta*) is a captivating member of the Furnariidae family, known for its intricate nest architecture. This moderately sized passerine measures approximately 15-16 cm (6-6.3 inches) in length and weighs about 15-18 grams. Its plumage is primarily a subtle olive-brown dorsally, gradually fading to a paler, greyish-olive on its underparts. A key identifying feature is its prominent rusty-rufous crown and forehead, extending to the nape, which contrasts with i...
The Olive Spinetail inhabits humid montane and subtropical/tropical moist lowland forests, preferring the dense understory and mid-story. It is commonly found in forest edges and secondary growth, typically at elevations ranging from 500 to 1800 meters.
The Olive Spinetail is primarily insectivorous, subsisting on a diet of various arthropods, including insects and spiders. It obtains its food by actively gleaning from foliage, twigs, and bark within the forest understory.
As a diurnal species, the Olive Spinetail is constantly active during daylight hours, foraging meticulously for arthropods. It employs a nimble gleaning technique, rapidly moving through dense foliage, twigs, and bark, often hanging upside down to inspect the undersides of leaves for hidden prey....
The Olive Spinetail (*Cranioleuca obsoleta*) is a resident species primarily distributed across southeastern South America. Its core range encompasses southeastern Brazil, extending southward through eastern Paraguay, into northeastern Argentina, specifically Misiones Province, and reaching easte...
Least Concern
- It belongs to the Furnariidae family, known as "ovenbirds" due to some species constructing elaborate, oven-like mud nests, though spinetails typically build complex twig structures. - Despite its name, the Olive Spinetail is not closely related to the true spinetails (Acanthizidae) found in Au...