Habitat
Seasonally flooded riverine forest with an understorey of dense thickets and vines. Also fairly disturbed gallery forest. From sea-level - 100 m.
Northern Brazil, in R Branco region of northern Roraima; sight record from adjacent Guyana.
 
Population
Estimated population is 2,500 - 9,999 (2010) and decreasing.
Status CR
Habitat destruction and degradation through conversion to rice plantations is the main threat.
For more information see BirdLife International Species Factsheet.
Voice
Song consists of pairs of short notes at one-second intervals, the second note slightly higher pitched.
Hoary-throated Spinetail (Synallaxis kollari) [XC354894]
by Ricardo Gagliardi from left bank of Rio Uraricuera, just east of BR-174, Roraima, Brazil (song)
Hoary-throated Spinetail (Synallaxis kollari) [XC279559]
by Jeremy Minns from Roraima. Rio Uraricoera. Ferry on RR-319, Brazil (song)
Subspecies
No subspecies.
Often placed with Ochre-cheeked Spinetail (Synallaxis scutata) and White-whiskered Spinetail (Synallaxis candei) in a separate genus Poecilurus, but no diagnosable differences from current genus. Forms a superspecies with second of those species, possibly also including the first, but that differs substantially in colour pattern and tail structure.