dying - the time when something ends; "it was the death of all his plans"; "a dying of old hopes"
demise, death
life-time, lifespan, lifetime, life - the period during which something is functional (as between birth and death); "the battery had a short life"; "he lived a long and happy life"
grave - death of a person; "he went to his grave without forgiving me"; "from cradle to grave"
end, ending - the point in time at which something ends; "the end of the year"; "the ending of warranty period"
swan
1. Any of various large aquatic birds of the family Anatidae chiefly of the genera Cygnus and Olor, having webbed feet, a long slender neck, and usually white plumage.
Hope that clears it up.