[DoctorTOneery]

I'm not sure purists have any more credibility about swans any more. They've changed.
As a species that has been observed around the world as a dominant bird group,
going back as far as The Royal English Swan Society, before the Royal interest in all English birds,
and birds around the world,
swans have been one of the most studied and hobbied birds in human history.

They have a unique quality, even amongst all nature, in that the males create a certain amount of sperm for that mating season,
and if they don't use it all up the glands open and it reduces itself back into the bloodstream where it is passed as urine.
Swans have always mated for life, a long lifespan, and if the mate transpires, swans remain single.

However, over ten years ago, for the first time, observed in Stratford, Ontario, Canada,
a male swan killed another male and took up with its' female partner.
That's still shocking behavior for birding groups.
Now, whether you can ascribe that to these birds being invasive species to begin with,
I'm not sure. After reading a lot of New York Times papers these holidays,
I'm not sure if this can be considered an invasive cultural act, in the pond or onstage.
Uh, at least I'm typing I'm not sure.