You are humanizing, but in reality it is a great way of explaining certain things. However, in this case, it probably is not a divorce in the making, rather this young male may actually be an offspring of this couple. Even after the parents chase the young birds away, until the juveniles actually leave and find their own mates, they will try to come back to the same habitat that they were hatched. In some instances, they do not understand why suddenly, their parents are chasing them.

Do you know if Bella and her mate had any previous young? Males will usually fight with males and females will fight with females, but rarely is there an all out beer brawl (without the beer) between a male and a female. Additionally, even if younger birds are aggressively attacked, the older birds seem to know the difference between a young bird that hasn't learned the pecking order as opposed to a true rival. If the older bird is truly much older and is in danger of losing his ranking, he will be very cautious about picking on someone much younger because he may ultimately not be strong enough to ward off a younger bird later.

Bella could have just been in the right place at the right time during the aftermath of the fight as usually females will not intervene in a male/male fight. Please let us know how this progresses. The Regal Swan