Everybody thinks swans are monogamous, oh well, I’ve read that they are not, and guess what? I also read the vultures mate for life, a mate is replaced only after the death of one individual. Can you imagine a wedding cake with vultures on the top?
Pictures of the swans from http://www.guru.net.nz/albums/UK_Stratford/
Pictures of the vultures from: http://www.birding-peru.com/