Roberts's warbler Oreophilais robertsi

A dull gray-brown prinia-like warbler with a long and graduated tail, pale gray throat, ochre eyes, and pinkish legs. Pairs and family groups may join mixed-species flocks, foraging studiously through the lower branches of forest, undergrowth and bracken, forest edge, and occasionally pausing to chatter in unison. Often groups call a repeated high-pitched nagging “nyerk-nyerk-nyerk…” and other buzzing notes, always less guttural than babblers. Within its range the similar-looking Chirinda Apalis is grayer than Robert’s Warbler, with a white-tipped tail, different call, and a tendency to remain in the canopy.