Winged visitors bank on Yamuna, ecological threats worry birders; four teams survey 22km stretch on river floodplain, spot 131 species

Winged visitors bank on Yamuna, ecological threats worry birders; four teams survey 22km stretch on river floodplain, spot 131 species

Winged visitors bank on Yamuna, ecological threats worry birders; four teams survey 22km stretch on river floodplain, spot 131 species
Winged visitors bank on Yamuna, ecological threats worry birders; four teams survey 22km stretch on river floodplain, spot 131 species