VIDEO: The release operation - RSPCA officers return the cleaned up swans.
RSPCA staff have started to release 49 swans back into the wild after they were saved from oil contamination during the floods.
The animal charity rescued the swans from Rotherham's Parkgate Canal Basin, off Rawmarsh Road.
Their feathers were caked in oil, which is thought to have spilled into the waterway from cars which were trapped in the deluge four weeks ago.
Officers used rescue boats picked up the swans and then transported them to RSPCA centres around the country, where staff were involved in the painstaking process of gently cleaning the feathers.
The first batch of 26 birds have been returned to the canal basin in Rotherham with more due to be released over the next few days.
The RSPCA launched an emergency fund-raising appeal on Facebook which raised almost £3,000 towards the clean-up operation.
VIDEO: The rescue operation - RSPCA officers collect the oil-covered swans four weeks ago.