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Fig. 18.4 Flock of greater white-fronted goose Anser albifrons in Pong Dam area
Fig. 18.5 Large fl ock of common pochard Aythya ferina
18 Galloanserae and Aquatic Neoaves of Pong Dam
Fig. 18.4 Flock of greater white-fronted goose Anser albifrons in Pong Dam area
Fig. 18.5 Large fl ock of common pochard Aythya ferina
18 Galloanserae and Aquatic Neoaves of Pong Dam