Helophorus laticollis

(Thomson, 1853)

New Forest Mud Beetle

Aquatic Coleoptera
Conservation Trust

OVERVIEW

Helophorus laticollis

Helophorus laticollis is a distinctive water scavenger beetle endemic to the New Forest in southern England, earning it the common name "New Forest Mud Beetle." This specialist species is adapted to the unique temporary pond systems of the forest's heathland landscape, representing one of Britain's most geographically restricted aquatic beetles.

Size: 3-4 mm
Family: Hydrophilidae
Status: Native to UK

CLASSIFICATION

Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Suborder: Polyphaga
Family: Hydrophilidae
Genus: Helophorus Species: laticollis

DISTRIBUTION

Helophorus laticollis UK Distribution

Current Range: Confined exclusively to the New Forest in southern England, representing one of the most geographically restricted beetles in Britain with no records from any other location.

Habitat Distribution: Found in shallow muddy margins of temporary ponds, ephemeral wetlands, and seasonal pools on New Forest heathland, requiring specific hydrological conditions and minimal disturbance.

10-15 Known Sites
New Forest Only Region

ECOLOGY & HABITAT

Temporary Ponds

Seasonal pools that fill and dry according to rainfall

Muddy Margins

Shallow muddy edges rich in organic detritus

Heathland

Traditional New Forest heathland landscape

Life Cycle: Complete metamorphosis adapted to temporary pond hydrology with rapid development during water presence

Diet: Detritivorous - feeds on decaying organic matter and microorganisms in mud and shallow water

Seasonal Adaptation: Life cycle synchronized with New Forest's unique seasonal pond cycles and grazing patterns

CONSERVATION STATUS

VULNERABLE
Key Threats:
  • New Forest habitat changes
  • Drainage of temporary ponds
  • Climate change affecting pond hydrology
  • Human disturbance and trampling
  • Changes to traditional grazing patterns
Population Trend:
Declining

CONSERVATION ACTIONS

1
Grazing Management

Maintain traditional New Forest grazing systems

2
Pond Restoration

Restore and create new temporary pond systems

3
Hydrology Protection

Protect natural water table and seasonal flooding patterns

4
Population Monitoring

Annual surveys and habitat condition assessment

KEY INFORMATION

Flight Period March - October
Elevation Lowland heathland
Stream Type Temporary ponds
Substrate Sandy margins