I used to visit High Park a few times every year but never encountered a GB heron, only GBH and BCNH. I never made it to the smaller ponds even though I had planned to check them out. I believe that one is called 'The Duck Pond' ... how original. I recall a very engaging one actively fishing in a swampy spot within the Rouge, which is an extensive area, and wishing that I had a longer lens than the 70-200mm that I was using at the time. I don't think that it would have been as engrossed if it had known that I was watching. I was buried under a camo cover with only my lens sticking out. A Green heron that I saw at Rattray some years ago was indeed co-operative and quite used to birders hanging around the site. I managed a close shot of it even with the inherent limitations imposed by my Canon G9 point-and-shoot (pre DSLR days). Those Nikon Coolpix PAS cameras that are currently available have enormous magnification but I didn't really plan using the G9 for birds. It was a gift and meant for general application and it was a terrific piece of kit for that purpose. It is also attractive to look at because it reminded me of an early rangefinder camera, like Leica. It felt great in my hand and I guess that the heron appreciated it too.