Omocestus rufipes - Woodland Grasshopper
(Zetterstedt, 1821)

Description: Small but strikingly coloured species (♂ 12-17 mm, ♀ 18-21 mm). The male has a brownish-black ground colour but the tip of the abdomen is (orange)red. The female is green on the back and greyish brown on the sides. The ventral side has the colours green-yellow-red in both sexes. The base of the labial palp is dark but the tip is white. The wings are slightly longer than the the hind knee, the side keels of the pronotum are slightly curved.
Similar species: Omocestus viridulus
Adults: from June to October.
The song starts softly then gradually increases in intensity and stops abruplty (after about 10 seconds). It sounds like the sound of a rapid alarm clock. Hearable up to 10-15 meters away.

Source: Orthoptera Species File (lab recording, 26 °C)
Habitat:  Hayfields, meadows, semi-arid grasslands, forest edges.
Widespread and common.

Omocestus rufipes, male
(Author: Sámoly Attila, source: ízeltlábú, CC BY 4.0)

Omocestus rufipes, female
(Author: Kiss Tamás, source: ízeltlábú, CC BY 4.0)