The Besaparski Hills are located at the South West end of the Thracian plain near by the town of Pazardzhik, in the foothills of the Rhodopes Mountain. It includes the low ridges and the adjacent open areas, reaching the road to Peshtera to the west and the Vucha river to the east. Its northern limit is the Maritza river and its southern passes through the grounds of the villages of Radilovo, Byaga, Kozarskoto and reaches the town of Krichim. The area includes also the fishponds next to the village of Trivoditsi. Besaparski Hills are limestone treeless hills. The average altitude is 350 m and maximum 536 m. About 90% of the area is occupied by dry calciphile and xerophyte grass associations and farmlands, as well as temperate shrub heath land. The most widespread grassland communities on the territory of Besaparski Hills are these of the Bread-grass Dichantium ischaemum due to the fact that the species is very resistant to grazing, trampling and especially erosion. There are isolated spots of broadleaved and mixed forests. Shrubs and low trees occupy a small share of the territory. Besaparski Hills represents calcareous hills with a characteristic flora, which defines their importance as refugia of rare, endemic and relict species. A local endemic species, Gypsophila tekirae, occurs on the ridges. Of the mammals the Souslik Spermophillus citellus deserves special attention, as it is the main prey of the diurnal raptors, some of which are very rare and threatened.