The Bornean black magpie (''Platysmurus aterrimus''), also known as the black crested magpie, is a

treepie The treepies (known also as crypsirinines from the subfamily's name, ''Crypsirininae'') comprise four closely related genera (''Dendrocitta, Crypsirina, Temnurus'' and ''Platysmurus'') of long-tailed passerine birds in the family Corvidae. There ...

in the family

Corvidae Corvidae is a cosmopolitan family of oscine passerine birds that contains the crows, ravens, rooks, jackdaws, jays, magpies, treepies, choughs, and nutcrackers. In colloquial English, they are known as the crow family or corvids. Cu ...

. It is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...

to the

Southeast Asia Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical south-eastern region of Asia, consisting of the regions that are situated south of mainland ...

n island of

Borneo Borneo (; id, Kalimantan) is the third-largest island in the world and the largest in Asia. At the geographic centre of Maritime Southeast Asia, in relation to major Indonesian islands, it is located north of Java, west of Sulawesi, and e ...

Taxonomy

The Bornean black magpie was formerly considered a distinctive

subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics ( morphology), but that can successfully interbreed. Not all specie ...

of the black magpie, but more recent revisions now consider it a full species, ''Platysmurus aterrimus''.

Description

The magpie is about 43 cm in length. It has all-black plumage with a long, broad and graduated tail, a stout black

bill Bill(s) may refer to: Common meanings * Banknote, paper cash (especially in the United States) * Bill (law), a proposed law put before a legislature * Invoice, commercial document issued by a seller to a buyer * Bill, a bird or animal's beak Pla ...

, a tall, bristly crest, black legs and feet, and red irises. It has a taller crest than, and lacks the white wing patch of, the nominate subspecies.

Behaviour

The magpie is a garrulous and sociable bird, often seen in family parties. It has a variety of whistling and chattering calls and is also a vocal mimic. It flies with shallow wing beats that produce a distinctive low throbbing ''whoo'' or ''boobooboo'' sound.

Breeding

A nest found in the

Tabin Wildlife Reserve The Tabin Wildlife Reserve ( ms, Taman Hidupan Liar Tabin) is a nature preserve in Sabah, Malaysia. It was created in 1984 to preserve Sabah's disappearing wild animals. Occupying a large part of the peninsula forming the northern headland of ...

in September 1981 was described as being about 20 cm across, built of sticks and sited 8 m up in a small tree.

Feeding

The magpie is an

arboreal Arboreal locomotion is the locomotion of animals in trees. In habitats in which trees are present, animals have evolved to move in them. Some animals may scale trees only occasionally, but others are exclusively arboreal. The habitats pose nu ...

foliage A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, ...

gleaning Gleaning is the act of collecting leftover crops from farmers' fields after they have been commercially harvested or on fields where it is not economically profitable to harvest. It is a practice described in the Hebrew Bible that became a legall ...

insectivore A robber fly eating a hoverfly An insectivore is a carnivorous animal or plant that eats insects. An alternative term is entomophage, which can also refer to the human practice of eating insects. The first vertebrate insectivores were ...

and

frugivore A frugivore is an animal that thrives mostly on raw fruits or succulent fruit-like produce of plants such as roots, shoots, nuts and seeds. Approximately 20% of mammalian herbivores eat fruit. Frugivores are highly dependent on the abundance and ...

, also opportunistically taking small mammals and reptiles.

Distribution and habitat

The magpie is found in the lowlands of Borneo, ranging in altitude up to about 300 m above sea level. It inhabits

primary forest An old-growth forestalso termed primary forest, virgin forest, late seral forest, primeval forest, or first-growth forestis a forest that has attained great age without significant disturbance, and thereby exhibits unique ecological feature ...

, including dipterocarp,

kerangas The Sundaland heath forest, also known as ''Kerangas'' forest, is a type of tropical moist forest found on the island of Borneo, which is divided between Brunei, Indonesia, and Malaysia, as well as on the Indonesian islands of Belitung and Bangk ...

and

peat swamp forest Peat swamp forests are tropical moist forests where waterlogged soil prevents dead leaves and wood from fully decomposing. Over time, this creates a thick layer of acidic peat. Large areas of these forests are being logged at high rates. Peat ...

, and is also found in

secondary forest A secondary forest (or second-growth forest) is a forest or woodland area which has re-grown after a timber harvest or clearing for agriculture, until a long enough period has passed so that the effects of the disturbance are no longer evident. I ...

, overgrown tree

plantation A plantation is an agricultural estate, generally centered on a plantation house, meant for farming that specializes in cash crops, usually mainly planted with a single crop, with perhaps ancillary areas for vegetables for eating and so on. Th ...

s and scrub.

References

{{Taxonbar, from=Q15708217 Endemic birds of Borneo Platysmurus Birds described in 1831 Taxa named by René Lesson