A specimen study found redder tails in Sabah birds of the former poliogene population than in Sarawak samples; two Bornean populations also had more olive backs and wings than west Sundaland specimens. A Malaysian Borneo forest study sampled ten birds, five from old-growth forest and five from selectively logged forest.
A specimen study found more olive backs and wings in two Bornean populations formerly included in Pellorneum malaccense (poliogene and saturatum) than in west Sundaland specimens. Within Borneo, Sabah specimens of the former poliogene population had redder tails than Sarawak specimens.
A 2026 study in Malaysian Borneo lists ten Pellorneum poliogene samples: five from old-growth primary forest and five from selectively logged forest. The authors describe all study species, including this one, as understorey forest specialists with low dispersal.
An extinction-risk assessment has not been added yet.