Red Triangle slug Click to enlarge image
Red Triangle slug Location: Wallarah NP, Central Coast Date taken: 12 February 2005 Image: Vicki Elliott
© Vicki Elliott

Fast Facts

  • Classification
    Species
    graeffei
    Genus
    Triboniophorus
    Subfamily
    Aneitinae
    Family
    Athoracophoridae
    Super Family
    Athoracophoroidea
    Suborder
    Helicina
    Infraorder
    Succineoidei
    Order
    Stylommatophora
    Superorder
    Eupulmonata
    Subclass
    Heterobranchia
    Class
    Gastropoda
    Phylum
    Mollusca
    Kingdom
    Animalia
  • Size Range
    14 cm

This native slug is probably the best known and one of the most spectacular slugs in Sydney gardens.

Identification

The Red Triangle Slug is Australia's largest native land slug. The distinctive red triangle on its back contains the breathing pore.



Habitat

Red Triangle Slugs are found in urban areas, forests and woodlands and heath.

Distribution

East coast of Australia: Queensland, New South Wales.



Feeding and diet

The Red Triangle Slug is usually found grazing on microscopic algae growing on the surface of smooth-barked eucalypt trees, leaving behind scalloped tracks as it goes. If given the chance, it will also remove bathroom mould.


Red triangle slug.

Red triangle slug.

Image: John Furlong
© John Furlong

Other behaviours and adaptations

Native slugs can be differentiated from introduced slugs because they have only one pair of tentacles, while introduced snails and slugs have two pairs. Also, the saddle-shaped mantle seen in introduced snails is reduced or absent in native snails and slugs.