The Inland Waterways Association of Ireland (IWAI) has confirmed a number of reports of dead swans found along the Grand Canal in south Dublin.

IWAI representative Colin Becker said some of the dead birds were taken away for analysis, while a number of sick birds were taken for treatment by the DSPCA. 

As of yesterday morning "another half dozen" deceased swans were discovered between Portobello Harbour and Suir Road Bridge.

Initial reports are pointing to a form of botulism or other bacterial infection. No source had yet been pin-pointed but "a number of dead and rotting sea-fish were found in the area", according to Becker.
He added that swans are known to be susceptibe to bacterial infections.

The IWAI ruled out the presence avian flu, and dismissed suggestions that dredging of the canal might have disturbed bacteria in the sediment, as the infected swans were found some distance from the current dredging site.

Waterways Ireland has confirmed that further dredging of the Grand Canal in Dublin will commence this month and continue till the end of April on the inland waterway.

The canal will be closed to navigation from Lock C4 at Baggot Street to Lock 1 at Suir Road for the removal of sediment and rubbish between Mespil Road and Portobello Harbour, making the canal navigable for a large range of boats.

Traffic management plans have been agreed with Dublin City Council to keep disruption to a minimum, and discussions have taken place with the National Parks and Wildlife Service on measures to minimise the impact on sensitive habitats along the canal.