Additional files [RJEE Vol. 9 (3). 2024 – 1]

• Pic. 1. Map of the distribution of Spermophilus suslicus Güld. сolonies’ points and population density (ind. per ha) in the right-bank Volga region in 2000, 2012 and 2024. The Heatmap (Kernel Density Estimation) module of the QGIS 3.4.5 software with a radius of 0,3° and a gradient display of population density was used to construct thermal images on the maps
• Pic. 2. Distribution of speckled ground squirrel’s (Spermophilus suslicus Güld.) colonies found in 2000 (n = 102), 2012 (n = 32), and 2015 (n = 15) by habitat element type: SFA, SS, CSS, SBS, GP, UAL, SFUA, CAL, RSS, FMA (see the text for explanations)
• Pic. 3. Distribution of speckled ground squirrel’s (Spermophilus suslicus Güld.) colonies detected in 2000 (n = 102), 2012 (n = 32) and 2015 (n = 15) in habitats consisting of different numbers of elements and confined to anthropogenic objects – cattle yards, sites with agricultural machinery, etc. Number of biotope elements: 1 – one; 2 – two; 3 – three; 4 – four; 5 – five