There are over 400,000 ha of registered grazing land (Tsadrog) in Bhutan (Table 5.1). Most of these are located above the tree line at elevations between 4000 to 5000 m. The area of registered grazing land available to cattle and yak is about 1.4 ha per animal. It is assumed that not all natural grasslands are registered. From this assumption, the total area of natural grasslands will be more than the tsadrog, contrary to what is given in the table below. This has happened probably because the natural grasslands estimated from aerial photographs were classified as forests because of substantial tree cover in some tsadrog areas (Roder et al. 2001).