Figure 3.

Bar-headed goose migration and altitude: map showing GPS locations received from bar-headed geese (black dots) on the Tibetan Plateau (the Himalayan mountains are in northern Nepal near the southern Chinese border). Background greyscale shading shows elevation from SRTM, and red shading shows elevations (a) above 5000 m, (b) above 5500 m and (c) above 6000 m. Left column shows migration across Tibetan Plateau. Middle and right columns show zoomed extents of commonly used valleys. Extents shown as black boxes.