Sigaus collinus

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Sigaus collinus
File:Brachaspis collinus 60694510.jpg
Sigaus collinus, New Zealand
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Orthoptera
Suborder: Caelifera
Family: Acrididae
Tribe: Catantopini
Genus: Sigaus
Species:
S. collinus
Binomial name
Sigaus collinus
(Hutton, 1898)

The Green Rock-hopper grasshopper, Sigaus collinus is an alpine species of short-horned grasshopper in the family Acrididae.[1] It is found in New Zealand in the mountains of northern South Island, above the tree line and as high as 2000 m asl.[2][3][4][5] In New Zealand alpine grasshoppers can freeze solid at any time of the year and are alive when they thaw out when temperatures rise.[6]

Sigaus collinus is flightless and adults are relative large (females 32 mm),[2] and common amongst scree and tussock.[7] Although widespread in 2020, about 97% of the habitat of the green rock-hopper grasshopper will be lost due to global warming by 2070.[8] The species is variable in colour; most individuals are green with yellow markings, but some are olive-grey. In the Kaikōura Ranges (Mt Luxford) S. collinus hybridises with S. nivalis,[9] but elsewhere the two species are well differentiated.[5]

An endemic species of mite (Erythrites jacksoni) is an ectoparasite of this grasshopper.[10]

The New Zealand alpine green rock-hopper grasshopper, Brachaspis collinus, at Rainbow Ski Field, Nelson Lakes National Park (adult female)
The New Zealand alpine green rock-hopper grasshopper, Brachaspis collinus, at Rainbow Ski Field, Nelson Lakes National Park (adult female)




References

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