This video from Britain says about itself:
BTO Bird ID – Ring Ouzel and Blackbird
With Ring Ouzel migration about to reach its peak this wonderful thrush can turn up almost anywhere. Check out the latest identification video to help separate this species from Blackbird, both on the ground, in flight and by song.
From Penny’s Hot Birding and Life blog in England:
Sunday, 12 April 2015
Ring Ouzel at Felbrigg Hall NT.
Ring Ouzel at Nunnery Lakes NR, Thetford.
Ring Ouzels x 3 at Snettisham Coastal Park.
Ring Ouzel, Whinchat, Tree Pipit at West Runton.
Spoonbill at Thornham Marsh, viewed from Titchwell RSPB.
Black Redstart at Breydon Water.
Ring Ouzels x 6 at Burnham Overy Staithe.
Ring Ouzel at Weybourne.
Black Redstart at Gramborough Hill, Salthouse.
Common Cranes x 2 flew west at 11.15am over Cromer.
Common Cranes x 2 flew NW at 10.30am over Happisburgh.
Ring Ouzel at Happisburgh.
Common Cranes x 2 flew SW at 11.40am over Sheringham.
Ring Ouzels x 3 at Sidestrand.
Ring Ouzel north of Choseley Drying Barns.
Garganey at Welney WWT.
Ring Ouzels x 3 at Roydon Common.
Black Redstarts, Little Terns x 4 at Overstrand.
Green-winged Teal, Red-crested Pochards x 5 at Titchwell RSPB.
Glaucous Gull at Cromer.
Ring Ouzel at Trimingham.
MEGA! HARLEQUIN DUCK still, Aberdeen, Highland, Scotland.