Ardea-alba balanced balancing bird carnivore carnivorous common-egret elegant feathers foliage great-egret greenery Heron large-egret long-legged long-necked motionless patient plumage reeds resting sharp-beaked solitary-feeder standing-still wader wading-bird waiting water’s-edge white white-egret widely-distributed yellow-billed yellow-eyed plume plumed reflections ripples wading water water-bird