Great diving beetle
Enw gwyddonol: Dytiscus marginalis
The Great diving beetle is a large and voracious predator of ponds and slow-moving waterways. Blackish-green in colour, it can be spotted coming to the surface to replenish the air supply it stores beneath its wing cases.
Species information
Ystadegau
Length: 3cmStatws cadwraethol
Common.