Bicolorana roeseli Hagenbach, 1822



Status. An isolated population situated in the marginal area of its global range. According to IUCN criteria categorized as Critically Endangered CR B1a.

Brief description. A small–sized cricket. The body length is 16,0 mm in males, 17,0 mm in females, ovipositor length 6,0–7,0 mm. The colouration is rusty–yellow or yellowish–green to gray. The hind wings are usually shortened, in males not reaching the apex of abdomen and in females reaching the centre of the abdomen. Individuals with well developed hind wings and fore wings are seldom recorded.

Distribution. Europe, Caucasus, Georgia, Armenia eastwards to West Siberia, North and East Kazakhstan and North Mongolia.

Distribution in Armenia. Known from only one site nearby the Hankavan village (Kotayk Province).

Habitats. Upper limits of forests (1800–1900 m above sea level).

Biological traits. Vegetarian. Larvae emerge in early June and adults occur from July to August.

Population size and its trends. Only few individuals are recorded. Trends in changes of abundance are unknown.

Major threats. Overgrazing, tillage.

Conservation measures. Protected in Hankavan Sanctuary.

Suggested conservation measures. Setting strict limitations on tillage and grazing within the species range in the sanctuary.


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Avakyan, 1981

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