High altitude flights by ruddy shelduck Tadorna ferruginea during trans-Himalayan migrations - Parr, N.; Bearhop, S.; Douglas, David; Takekawa, J.Y.; Prosser, Diann; Newman, S.H.; Perry, W.M.; Balachandran, S.; Witt, M.J.; Hou, Y.; Lu, Z.; Hawkes, L.A. (Journal of Avian Biology, 2017)