Jennifer Youngman from the USA, who made this video, writes:
An American bittern feeds in the Nisqually Wildlife Refuge in Washington State a couple of hours before dusk in early March – alert to the human noises recorded here, but not unduly alarmed. His legs were as green as stems, and he swayed his neck like rustling reeds. To the wriggling frog he caught in this video and to all the other little morsels, he must have looked like just another plant.
Somerset’s Avalon Marshes bittern population booming: here.