The Hoary-throated Spinetail (Synallaxis kollari) is restricted to a small area of gallery forests along the tributaries of the rio Branco, in the extreme northern Amazon (Remsen 2003, Vale et al. 2007). These gallery forests are not surrounded by rainforest, as might be expected by its location in the Amazon Basin, but by a very large natural savanna.
The species is currently classified as Endangered by the International Union for Conservation of Nature (IUCN), based on its small, fragmented and declining range (BirdLife International 2009). Within its range, however, the species is common, occurring in moderate to large numbers, and is easily found during brief periods of fieldwork (Vale et al. 2007). The main threat to the Hoary-throated Spinetail is the rapid conversion of the gallery forests within its range into rice plantations (Vale et al. 2007).