New data on the distribution and ecology of Lignyoptera fumidaria (Hübner, 1825) in the steppe zone of Northern Kazakhstan

New data on the distribution and biology of Lignyoptera fumidaria (Hübner, 1825) in the steppe zone of Northern Kazakhstan is presented. As a result of surveys conducted in October 2025, two new localities of the species were identified in the Aiyrtau District, located 300 km south of previously published records within the region. A mass aggregation of approximately 250 males was recorded within an area of about 3 ha. Adult activity was observed under persistently sub-zero temperatures (down to −6 °C). The new findings significantly expand the current knowledge of the species’ range in Western Siberia and Kazakhstan and highlight its potentially underestimated distribution within the steppe zone.