9 Po

ment behaviour of the spotted sand lizard (Pedioplanis l. lineoocellata) in the southern Kalahari. Foraging degraded habitats with low prey availability and in non-degraded habitats with high prey availability the nd us abundance and diversity in degraded savanna habitats (e.g. Meik et al., 2002), others found higher lizard abundance and diversity (e.g. Fabricius et al., 2003; Smart et al., 2005). Clearly, the avail-ability of key resources (e.g. food, sites for nesting) are major drivers for changes in abundance and diversity in degraded activity to capture sufficient prey. In contrast, the change in habitat structure from grass dominated (non-degraded) to shrub domi-nated (degraded) increases predation risk by raptors since total vegetation cover and the availability of the lizard’s favoured hiding places (dense perennial grass tussocks) are significantly lower. The study is based on the results of Wasiolka et al. (2010) who found that home range size of the spotted sand lizard is signifi-cantly larger in degraded Kalahari savanna habitats than in non