Giant horntail
Enw gwyddonol: Urocerus gigas
With yellow-and-black bands, the giant horntail looks like a large wasp, but is harmless to us. The female uses her long, stinger-like ovipositor to lay eggs in pine trees, where the larvae then develop.
Species information
Ystadegau
Length: up to 4cmStatws cadwraethol
Common.