Flock moving to the left while others move to the right and tucking their heads into their bodies as they sleep, Spot-billed Pelican or Gray Pelican Pelecanus philippensis, Thailand

spotbilled pelican pelecanus philippensis pelican birds thailand pond lake water freshwater grassland waders wings bill trees sky gray pelican india indonesia southern asia coastal near threatened water bird wingspan pelecaniformes pelecanidae monotypic plumage large beak flock foraging swimming