We went to the Millenium Trail earlier in May to see the heronry but it was gone. Only one nest remained and no herons were there.
I did get a few photos of this swan chasing a Canada Goose away from the nest his lady friend was sitting on. Kind of funny to watch. Both of these birds can be miserable but the swan won this round.
He spots the Canada Goose 
His wife is on the nest 
Get away 
Now ! 
And he finally got the message 
He didn’t come back while I was there, guess he learned his lesson!
Trums Travels 