Swooping Knot In Murmuration With Coordinated Patterns Changing Direction Together In Snettisham, Norfolk, England

swooping knot murmuration bird pattern change direction turn together snettisham norfolk england sky cloud panorama ocean sea coast bay coastal flock beach birdwatching moving coordinated phenomenon water shoreline coastline nature habitat migratory creature animal shape motion seabird no people nobody horizon fly flying environment natural behavior migration large group ornithology