Grey Wagtail Bird Feeds Drinking Water in Running Stream, Forages Walking on the Rocky Bank Of Running Brook - close-up

grey wagtail wagtail eat feeds algae stream motacilla cinerea bird feed wag tail brook peck bill beak grey yellow plumage feather wing one animal wild wildlife closeup fast flowing river south korea walk nature rock gray slow motion water colourful lone feathers behavior hunting breasted shallow environmental rapids wagging detail hungry bank riverbank