The Mute Swan (Scientific name - Cygnus olor) is the swan most often seen in parks. This species is native to most parts of Europe and Asia and has been more recently introduced to North America, Australasia and Southern Africa.
The Mute Swan is a white bird with a long neck, orange and black bill and a distinct knob at the top of the bill.
Top photo taken in Stratford-upon-Avon, England in March 2013, the second photo was taken at Kensington Gardens in London, England in April 2013, the third photo was taken in the Fraser River at Steveston, B.C. in August 2009 and the bottom photo taken in West Vancouver, B.C. in May 2010 of a pair with their young.