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With 12cm a medium sized Swiftlet, very similar to sympatric Uniform Swiftlet.
Forms a superspecies with Philippine Swiftlet, Moluccan Swiftlet, White-rumped Swiftlet and Australian Swiftlet. Also considered to be conspecific with Uniform Swiftlet. Relationsships in this group are still poorly understood.
Wide range of habitat, but prefers highland forest up to 4000m. Low numbers recorded over moist lowland forest.
Takes insects in flight. Highly gregarious and often seen with other Swifts.