Large flock of starlings gathering on a winter evening making amazing shapes

starling murmuration of starlings nature murmurations flock flight birds sky fly starlings bird flock evening wildlife background dusk silhouette swarm bird roost england winter group large sturnus vulgaris migration pattern flying landscape uk phenomenon acrobatics swooping natural outdoor flocking in flight seasonal thousands european starling action birds flying cumbria birdwatching outdoors 4k mass of birds shapes