It's the type of swan heard here
However, some trumpeter swans have yellow lores; many of these individuals 
appear to be... [DOC] [TLE] Swan song - Wikipedia [PAR] The swan song is a metaphorical phrase for a final gesture, effort, or performance 
given just ... Aesop's fable of "The Swan and the Goose" incorporates the swan 
song legend as saving its life when it was caught by mistake ... of the beauty of 
the supposed song and so full of detail as to imply that he had actually heard it:... [DOC] [TLE] Dance review: Los Angeles Ballet opening weekend of 'Swan Lake ... [PAR] Mar 4, 2012 ... Swan Corps de Ballet in Los Angeles Ballet's Swan Lake_Photo by Reed ... to 
prove its pointe shoe prowess with the premiere of Swan Lake.