Monocentropus balfouri

Socotra Island Blue Baboon

8 active listings · Spiders

About the species

Socotra Island Blue Baboon (Monocentropus balfouri) is a tarantula endemic to the island of Socotra, which belongs to Yemen. It inhabits dry, rocky habitats and leads a terrestrial lifestyle with a strong tendency to use fissures, shallow burrows, and extensive webbing. Adults reach about 7 cm in body length, and the leg span may reach about 18 cm. The species is distinguished by contrasting colouration in which blue legs and carapace are set against a paler abdomen.

Origin and distribution

Socotra (Yemen)

Endemic

The species is endemic to Socotra.

Occurrence areaLocation / context

Current listings

Care at a glance

  • Size

    About 7 cm body length; leg span up to approx. 18 cm

  • Enclosure type

    Horizontal, with space for digging and building extensive webbing

  • Substrate

    A thicker, stable layer; the surface rather dry, the lower parts may be slightly more humid

  • Furnishings

    A hide, structures for anchoring webbing, and constant access to fresh water

  • Conditions

    Rather dry to moderate, with very good ventilation

  • Characteristics

    Extensive webbing, slower growth, great speed when startled, and unusual tolerance of conspecifics

Care and behaviour

Monocentropus balfouri readily reshapes its surroundings with silk, linking the hide, substrate, and furnishings into an extensive tunnel system. The enclosure should provide a thicker layer of stable substrate and several attachment points for webbing, while avoiding unnecessary enclosure height.

Because of the dry conditions on Socotra, adults do not require constantly damp substrate. The surface may remain mainly dry, with a small part of the lower layers slightly humid. More important than intensive spraying are good ventilation and constant access to fresh water.

Monocentropus balfouri is known for greater tolerance of conspecifics than most tarantulas. Communal keeping is practised in captivity, but it should not be regarded as risk-free. Communal housing requires sufficient space, experience, and constant observation, so keeping animals individually remains the simplest option.

Good to know

Monocentropus balfouri belongs to the Old World tarantulas and does not have urticating hairs. When startled it can move very quickly and, if threatened, use defensive behaviour. When working in the enclosure, direct contact should be avoided and the space always secured against the spider escaping.

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