Rhacocleis germanica - Mediterranean Bush-cricket
(Herrich-Schaeffer, 1840)

Description: Medium-sized, slender species (♂ 14-20 mm, ♀ 15-27 mm). Usually brown, but may also be grey or black. The wings are vestigial in both sexes. Ovipositor is 14-19 mm, slightly curving upwards. The male's cerci have a large, inward-pointing spine at the base.
Similar species: Pachytrachis gracilis
Adults: from June to October.
The buzzing, very rapid song consists of short chirps (0.2-0.7 sec) repeated every 1 to 3 seconds. It sings mainly at night. Its voice is barely audible, but can be easily be observed with a bat detector (at 30 kHz).

Source: Orthoptera Species File (lab recording, high pass filter, 25 °C)
Habitat:  Rocky places, open forests, shrubs. Thermophilic. It prefers tall vegetation.
Rare in hills and mountains, mostly on the southern slopes (e.g. Mecsek, Transdanubian Hills, Naszály, Cserhát, Mátra).
Note: There are a few sightings of Rh. annulata, a species from the Mediterranean region. Most likely the species has been introduced through trade and the transport of horticultural materials as it was found around garden centres and in settlements. There is no evidence of a viable population in Hungary. It can be distinguished from Rh. germanicaby the male cerci and the dark hind knees. Rh. annulata also has a more conspicuous light patch on the lateral lobes of the pronotum.

Rhacocleis germanica, male
(Author: Ján Svetlík, source: flickr.com, CC BY-NC-SA 2.0)

Rhacocleis germanica, female
(Author: Nagy Sándor, source: ízeltlábúak.hu, CC BY 4.0)