Starling flock (Sturnus vulgaris) at sunset, with Marsh Harrier (Circus aeruginosus) flying beside the flock.

- Image ID: FB7K9F
Starling flock (Sturnus vulgaris) at sunset, with Marsh Harrier (Circus aeruginosus) flying beside the flock.
Andrew Bailey / Alamy Stock Photo
Image ID: FB7K9F
Starling flock (Sturnus vulgaris) at sunset, with Marsh Harrier (Circus aeruginosus) flying beside the flock, grouping in the sky caused by presence of predators, with pink sunset colours, RSPB North Warren nature reserve, Suffolk, December 2011
Location: North Warren, Aldeburgh