Status: British Isles non-native species.
Description: 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.
Habitat: Native to New Zealand. Recorded in the UK (predominantly Devon and Cornwall distribution). Two likely periods of introduction 1920’s and 1970’s.
Phenology: Adult insects can be seen from April through to December. The species can breed parthenogenetically, that is, eggs develop without the need for fertilization by a male. Indeed, Acanthoxyla males are unknown, even in their native country.
Distribution: The records held by the National Biodiversity Network are shown in the map below.
Terms & conditions
Colours show the year of the last record -
up to 1987
1998 up to present
Only Recording Scheme datasets are included. Other datasets on the Gateway may hold additional information.Open interactive map for all datasets in new window