Ixos rufigularis

is endemic to Mindanao, Philippines, where it is known from around Lake Lanao (Meyer de Schauensee and duPont 1962) and the Zamboanga Peninsula, plus Basilan including Malamaui (Dickinson et al. 1991). Although characterised as "common in forest and forest edge" (Dickinson et al. 1991), recent evidence—an almost fruitless search in the Zamboango City watershed—suggests that it is fairly uncommon and possibly suffering from habitat loss within its somewhat restricted range (G. C. L. Dutson in litt. 1994).

Criteria nearly met: B1+2c; C1; C2a.