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Adult beetles

Chewing mouthparts, abdomen covered by hard wing covers
Adult Alligator weed flea beetle [Agasciles]. Image: Stephen Moore

Alligator weed flea beetle (Agasciles)

[Agasciles] is a beetle with a grub-like larva, having short legs and a large soft abdomen. The adults have a body shape similar to many ...

[Antiporus] larva. Image: Stephen Moore

Diving beetle (Antiporus)

[Antiporus] is one of the dytiscid “diving beetles” having larvae and adults that are active swimmers. The larvae have a spoon-like “nose...

[Hyphydrus]. Image: Stephen Moore

Diving beetle (Hyphydrus)

[Hyphydrus] is one of the dytiscid “diving beetles” having larvae and adults that are active swimmers. The larvae have a spoon-like “nose...

[Lancetes] adult with strong yellow and black striping. Image: Stephen Moore

Diving beetle (Lancetes)

[Lancetes] is one of the dytiscid “diving beetles” having larvae (which we haven’t managed to photograph yet) resembling those of [Rhantu...

[Liodessus]. Image: Stephen Moore

Diving beetle (Liodessus)

[Liodessus] is one of the dytiscid “diving beetles” having larvae and adults that are active swimmers. The larvae have a short cone-like ...

[Onychohydrus]. Image: Stephen Moore

Diving beetle (Onychohydrus)

[Onychohydrus] is a dytiscid “diving beetle” with very large larvae (up to 50mm) and adults that are active swimmers. The larvae have a d...

[Rhantus] adult. Image: Stephen Moore

Diving beetle (Rhantus)

[Rhantus] is one of the dytiscid “diving beetles” having larvae and adults that are active swimmers. The larvae lack any nose-like projec...

Moss beetle (Hydraenidae). Image: Stephen Moore

Moss beetles (Hydraenidae)

Hydraenids are tiny beetles; the adults being less than 3mm long. The larvae are primarily terrestrial and are rarely recorded in streams...

Riffle beetle (Elmidae) adult. Image: Stephen Moore

Riffle beetles (Elmidae)

Elmids are small beetles with long, slender, mealworm-like larvae. The larvae have retractile hooks and gill tufts under the last (9th) a...

Rove beetles (Staphylinidae). Image: Stephen Moore

Rove beetles (Staphylinidae)

New Zealand staphylinids are largely terrestrial, but the adults often live along stream margins and can be collected in stream samples. ...

[Berosus]. Image: Stephen Moore

Water scavenger beetle (Berosus)

[Berosus] is a hydrophilid beetle with an easily recognised larva that has tentacle-like gills along the abdomen. As in other hydrophilid...

Water scavenger beetle (Hydrophilidae) adult. Image: Stephen Moore

Water scavenger beetle (Hydrophilidae)

Hydrophilid beetles (or water scavenger beetles) have larvae with soft abdomens that may be covered in bumps or long gills (see [Berosus]...

[Laccobius]. Image: Stephen Moore

Water scavenger beetle (Laccobius)

[Laccobius] is a hydrophilid beetle with a larva that has asymetrical mandibles (the two sickle-like jaws are not the same shape). The ad...

[Limnoxenus] adult. Image: Stephen Moore

Water scavenger beetle (Limnoxenus)

[Limnoxenus] is a large hydrophilid beetle with adults 9mm in length (much larger than most NZ freshwater species). The underside of the ...

[Gyrinus]. Image: Stephen Moore

Whirlygig beetle (Gyrinus)

[Gyrinus] is known as the “Whirlygig beetle” which reflects the chaotic swimming motion of the adults on the water surface. The streamlin...