Interactive key 125

Tympanal opening broad, oval-shaped. Hind tibia orange coloured.

Penumbra Grasshopper
(Chorthippus vagans)
Chorthippus vagans
Tympanal opening is narrow. Side keels of pronotum angularly curved.

Chorthippus biguttulus species complex
(Ch. biguttulus + mollis + brunneus)

These species can't be separated in the field. Best method is listening to the male song.