An Atlantic puffin (Fratercula arctica) pounding the sea with its feet as it builds enough speed to get airborne. I photographed this bird near the Bass Rock in southeastern Scotland. Puffin wings are designed both for rapid aerial flight (exceeding 50 mph) and for underwater diving (200 feet down). Take-off is therefore cumbersome, as the wings only generate lift at high speeds.
This bird likely had chicks in a burrow on the islands nearby. Peregrine falcons patrolled the cliffs. Two good reasons for agility.