Just inside the park at the end of my road and overlooking the tennis courts there is a great big Blue Heron roost. I used to live a couple of buildings closer to it, and that braying, prehistoric noise they make would wake me me up prompt at six a.m. But that was as nothing to the baleful racket that went up whenever a Bald Eagle would swoop down through the branches to snatch up a few baby Herons. Noble looking but indolent animals, those Eagle things.
The Herons eat fish. There are are over 50 nests (actually, lots more I think). Herons also crap. So, you can imagine the general state and stink of the tennis courts and surrounding pathways. Best avoided. And, it is interesting, this roost, because Blue Herons tend not to hang out together in the wild, and certainly not in these kinds of numbers. It is rather cute to see them return to the city in early May. In ones and twos, at first. Then gathering in fives and tens, and gradually more. They kind of move together from spot to spot. It is quite a sight to see these large and relatively slow flying and ungainly birds flock and then try to get themselves all to land on the top of a building at the same time.
I remember seeing the smelt run earlier this year. I watched a vast, black shoal of tiny fish swim towards one of the Herons, who was just sitting on a rock waiting on the off-chance of a passing fish supper. Then this lot of tiddlers presented itself in a wave. The Heron couldn't scoff them up fast enough and looked somewhat overwhelmed and at a bit of loss. Quite touching, really.
I am moving from Vancouver to Calgary this Summer. One thing is evident, the Heron numbers have really increased substantially over the past fifteen years. The parks department wrap the base of their roosting trees in copper (?) sheet and clingfilm to deter Racoons etc. from sidling up for a snack. The Parks Board building is very close to the Heron roost, just out of pooping range, and is one of the loveliest pieces of 60s architecture.