Bornean Black Magpie Platysmurus aterrimus

Glossy black bird with a long tail, a heavy hooked bill, and a weak tuft of a crest. Inhabits lowland and foothill forests. Moves in pairs and flocks, calling to keep in contact. Sometimes moves with mixed-species flocks. Vocalizations are quite variable, and include a fast series of short rasping notes, as well as various strange whistled notes, often with a musical-instrument-like quality. Formerly grouped with Malayan Black Magpie under the more generic “Black Magpie.”