Oedaleus decorus is a widely distributed acridid over the Eurasian semi-arid territories, from the Atlantic coast to the Pacific coast. In many semi-arid territories, O. decorus was and is the most important pest, but in the south-eastern part of West Siberian Plain, it was not considered a pest until the 1960s. We compared two sets of data on the acridid distribution in the region: before 1960 and from 1961 until 2021. Until the 1960s, the species occurred mainly in the southern steppes. Since the 1960s, its distribution changed significantly. Nowadays, it occupies almost all local steppes and the southern part of the forest-steppes and can be also found on the eastern side of the Ob River. These shifts may be explained by both climatic changes and changes in human activities. During upsurges the densities of O. decorus were often more than one to two adults per square meter. It is often abundant in the same habitats and in the same periods as the Italian locust (Calliptamus italicus)—one of the most important acridid pests. This means during joint outbreaks these two species can simultaneously damage almost all spectrum of plants.

Grasshoppers (Acridoidea) are one of the most essential components of grassland ecosystems. They are mainly primary consumers and some of them, e.g., the Italian locust, may be very important pests. The main goal of this article is to discuss possible shifts in the species distribution relative to global and local changes. General patterns of latitudinal, longitudinal, and altitudinal distribution of its populations are revealed for the eastern part of its range (mainly from 70° E eastward). Data on its historic and modern localities with geographic coordinates were collected and analyzed. The Maxent approach was used to model species distribution. The comparative analysis shows there are no significant changes in its range. The analysis of altitudinal distribution over mountains of the region demonstrates no significant changes as well. The expected distribution of Calliptamus italicus based on the location points displays significant changes in areas suitable for the species and their evident associations with outbreak occurrences. The models created for 2021–2040 and 2041–2060 unveil that, in the future, the local parts of the Italian locust range may shift northward and north-eastward, but the main areas with suitable conditions for this species will remain almost the same.

New data on distribution, ecology and biology of the rare extant species Paracyphoderris erebeus of the almost completely ancient family Prophalangopsidae (Orthoptera) are given. This montane species prefers humid areas with relatively low summer temperatures. Habits, mating behaviour and life history of P. erebeus are extremely similar to those of the North American representatives of the genus Cyphoderris. Nowadays, the Amurian grig is known from the Myaochan, Badzhalsky, Dusse-Alin, Bureinsky and Aezop ridges in the Khabarovsk Territory (north of the Amur River) and Bydyr Mountain in the Jewish Autonomous Region of Russia only. The analysis of the predicted distribution of P. erebeus based on the occurrence data reveals that the populations of the species may be more widely distributed over the southern part of the Russian Far East, at least up to 56° N. The ecologo-geographic model of the species distribution over its range is generated using the Maxent 3.4.4 software for the first time. Modelling of the P. erebeus distribution for 2021–2040 and 2041–2060 shows that the position of the species range appears to be relatively stable but a weak decline in the foretold suitability during climate warming may result in a reduction in population sizes and the subsequent fragmentation of the species population system. In this case, the Amurian grig will become a prospective to be included on the IUCN Red List.

Grasshoppers are one of the most important groups of primary consumers in the mountains of Inner Asia. During outbreaks, they can eradicate all or almost all green phytomass. Besides, these mountains are also home for many endemic taxa. The goal of the article is to reveal the main patterns of acridid altitudinal distribution and its feasible alterations in the mountains of Inner Asia relative to climate change and alteration of human activity. Altitudinal distribution patterns are revealed for the different mountains of Inner Asia, and their peculiarities are characterized. The significant contrast is shown between the northern parts of the region where the altitudinal long-term shifts in grasshopper distribution are absent or very weak and its central and, probably, southern areas wherever such alterations look like extremely considerable. The results of distribution modelling of two mountain endemics (Stenobothrus newskii and S. kirgizorum) are discussed. In this context, importance of adding the data on altitudes is shown. The main trends in grasshoppers’ distribution alterations are characterized for the mountains of Inner Asia. However, these trends are multidirectional and the reasons determining them are not always obvious, problems arise in assessing the factors determining the shifts in the altitudinal boundaries of ranges, and the actual state and probable fate of mountain populations of both possible pests and rare and/or endemic species.

Two abundant acridid species (Chorthippus apricarius and Locusta migratoria) are widely distributed over South Siberia. Estimations of suitability conditions on the basis of the MaxEnt algorithm well correspond to the known localities of each species for the contemporary period. The main bioclimatic variables explaining these species distribution are associated with temperatures, especially those of the cold season. Predicted distribution patterns for 2021–2040 and 2041–2060 and for the scenarios of the high levels of the greenhouse gas emission show serious significant differences between the two model species. These forecasts demonstrate the explicit worsening of conditions for Chorthippus apricarius in South Siberia, and the significant expansion of territories applicable for Locusta migratoria in the southern parts of West Siberia and in Northern Kazakhstan. This trend looks like enhancing in the second half of the 21st century. The optimal areas for the migratory locust may cover the huge territories between 50° and 62° N and between the Ural Mts. and the north-western parts of the Altai-Sayan Mts. where a new area of possible outbreaks of L. migratoria may emerge. In the adjacent regions, the areas with suitable conditions for this species can expand significantly as well, including Primorskii Territory. Hence, the general continuation of global warming will most likely lead to some significant shifts in the distribution of some possible acridid pests across South Siberia.

Aim. Angaracris barabensis is widely distributed across the Asian grasslands. It is often qualified as one of the important pests. The aim of the paper is to estimate possible shifts of its distribution relative to global warming. The geographic coordinates of 384 localities were determined for the species. Two different approaches to species distribution modelling (maximum entropy and multidimensional ellipsoid envelope) were used. The general patterns of distribution were described. Several models of the species distribution were generated and compared. The main factors of its distribution are revealed. Ecological modelling predicts opportunity of possible northward shifts of the species range in Central and East Siberia and persistence of areas of possible harmfulness in South Siberia, Mongolia and North China. Our predictions show two opposite trends. In the western and southeastern parts of the species range, suitability of conditions will decrease. In the central and north‐eastern parts, the suitability will remain almost the same or even increase. The comparative analysis shows there are no evident contemporary shifts of range boundaries of A. barabensis associated with global warming per se or this tendency is extremely weak. However, the distribution of suitable conditions can change significantly during the next several decades.