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Clitarchus hookeri (White, 1846)

Smooth Stick-insect

Taxonomy: Phasmida>>Phasmatidae

Status: British Isles non-native species.

Description: Either green or brown. The Unarmed Stick-insect and the Smooth Stick-insect appear similar at first glance. They can distinguished because the Smooth Stick-insect has a near continuous black line along its thorax, has pointed cerci, and has no opercular spine, whereas the Unarmed Stick-insect has a black line on the pronotum only, has rounded cerci, and has a stout opercular spine.

Size: About 85 - 90 mm.

Food: Herbivorous.

Habitat: Native to New Zealand. In the UK only known from the Isles of Scilly.

Phenology: The species can breed parthenogenetically, that is, eggs develop without the need for fertilization by a male. Males of the Smooth Stick-insect are common in New Zealand, but none have been found in Britain.

Distribution: The records held by the National Biodiversity Network are shown in the map below.
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