Methods
The study area was stratified into four main study units or census zones based on the main vegetation types and data was collected from these census zones; such as riverine forest, and ground-water forest (67.5 km2), grassland (270 km2), and bushland (80.87 km2) census zones through line-transect survey following the work of Sutherland (2006). Out of the possible transects formed in each area of the census zone, several representative samples of transect were randomly selected and marked for sampling using random numbers.