Crane is a bird that has a soul mate with integrity media. When a mate dies from there it will go to a couple again. We don't want people to such an extent that only the soul mate akho until they die from it, just to do it.
Flamingo a bird that is faithful to the media partner. When a partner dies, it will be a couple again. We do not even then only to let the spouse until death, then it's hard to do just this.
The crane is a bird with loyalty to the love of my life. When my partner died, it will be a couple again. People don't need to it simply asks with partner until the die to do this difficult.