Justification of Red List Category
This species is classified as Near Threatened as it has a moderately small population which is probably declining owing to habitat loss and degradation in parts of its range, and within which all subpopulations are small. Further population estimates could result in its uplisting to Vulnerable.
The population is preliminarily estimated to number at least 10,000 individuals, roughly equating to 6,700 mature individuals. This requires confirmation.
The population is suspected to be in decline owing to ongoing deforestation and habitat destruction.
Pseudocolopteryx dinellianus occurs within a discrete range in north Argentina (Tucumán, Santiago del Estero, Santa Fe, Córdoba, and possibly Salta), with presumed wintering records from north Formosa, Argentina (J. C. Chebez in litt. 1995, 1999), adjacent Bolivia (two specimens collected in Tarija, 1926) and Paraguay (seven records, four from the Chaco and three from the Oriente) (Lowen et al. 1996). It is more or less common in Córdoba, where the major global stronghold is protected by the Bañados del Río Dulce and Laguna de Mar Chiquita Natural Park, and frequent in Santiago del Estero, but there are no recent records for Tucumán. In some areas it may be declining due to agricultural conversion; however, extensive areas of suitable habitat remain in its breeding and wintering ranges, and the population seems relatively stable.
It inhabits periodically flooded rushy and grassy marsh vegetation and shrubbery near watercourses in lowland scrub, with nests found in bushes, rushes and tall grass.
Canalisation may affect the wetlands of Bañados del Río Dulce and Laguna de Mar Chiquita (J. C. Chebez in litt. 1995, 1999), and there are other modifications to wetlands occurring within its range (Hayes et al. 1994). Where it inhabits drier savanna-type vegetation, it is probably under some pressure from agricultural conversion.
Conservation Actions Underway
The stronghold is Bañados del Río Dulce and Laguna de Mar Chiquita Natural Park (Argentina). In the non-breeding season it occurs in San Antonio Private Nature Reserve and Tacuara National Park, Paraguay.
11.5 cm. Small, pale yellow and brown flycatcher. Upperparts pale olivaceous brown, with plainer brown crown. Underparts yellow, brighter on throat. Faint buffy wing-bars. Similar spp. Most similar to Warbling Doradito P. flaviventris which is browner above with a more rufescent crown; often shows a squared-off head shape, well rounded in Dinelli's. Voice A series of soft, high pitched chattered and fast rolling notes chrrret-chrrret chrrrut ended up in a very thin íík. Hints Generally conspicuous and tame in their shrubby habitat, but not always easy to locate.
Text account compilers
Capper, D., Mazar Barnett, J., O'Brien, A., Sharpe, C J & Symes, A.
BirdLife International (2018) Species factsheet: Pseudocolopteryx dinelliana. Downloaded from http://www.birdlife.org on 26/04/2018. Recommended citation for factsheets for more than one species: BirdLife International (2018) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 26/04/2018.