Account
What the sources say about this taxon, as written.
distribution · 
Plazi
Distribution : Madagascar , Kenya , Uganda , Mauritius (Bailey & McCrae 1978). Habitat : Common species in East Africa in all kind of open grassland habitats, road sides and forest edges. Song: Very loud continuous song, produced only at night.
description · Plazi
( Figs. 10 E–H, 48A–C) Diagnostic remarks. A highly polymorphic species ( Bailey 1975 ; Owen 1965 ; Robinson & Hartley 1978 ), distributed over most of sub-Saharan Africa. In the Gorongosa population all color forms described by Owen (1965) are present ( Figs. 10 F–H). It is a large Ruspolia , with the total body length of 52–60 mm , with long wings that extend beyond the hind knees and the tip of the ovipositor in females. The dorsal surface of the stridulatory vein is distinctly thickened in the middle and narrowed at both ends; the thick posterior vein of the mirror (A 1 + A 2 ) is evenly rounded; file with 112 teeth ( Fig. 10E ).
discussion · Plazi
Remarks. The stridulatory file of the specimen from Dembi Forest is shown in Figure 6 .
description · Plazi
First faunistic record for Croatia : Heller 1988 (after Schumacher 1978 ) Distribution in Croatia : Rovinj ( Istria ). Introduced African species, differs from R. nitidula by a smaller number of stridulatory teeth (64–86 vs. > 120). Another introduced population in Europe recorded in Bodensee ( Germany ) ( Heller 1988 ). Distribution in Europe: Croatia : Rovinj, Germany : Bodensee (see above).
description · Plazi
Song. Very loud song of continuous sequence of syllables, produced only at night. Altitudinal range at Mt Kilimanjaro : 900–1500– 1800 m . Records : 100
behaviour · bio.acousti.ca
The song of R. differens in the Ugandan population was described by Bailey (1976). Individuals in Gorongosa produce calls similar to those of the Ugandan population. They consist of long, uninterrupted trains of short syllables (mean syllable duration 0.00493 s, SD=0.000242; n=16) at the rate of 160 syllables/sec (at 21°C), with the frequency peak at 13.4–14.6. kHz. The call is relatively loud and readily audible to an average human ear (Figs. 48A–C).