White Wagtail Amur Wagtail Bird Jumps From Stone to Stone in Shallow Water Brook

white wagtail wagtail bird forage algae rock behavior coast rocky shore amur wagtail white eat motacilla alba water stream river brook feed black color plumage wing walk willie pied blackbacked japanese pied south korea closeup macro detail one single animal fast flowing crek running peck slow motion wet bill beak avian ornithology stone moss seaweed alga