Thanks all for your comments.
I really was not sure of the Black-crowned Night Heron as the markings did not seem to match the ones that I looked up on the web.
DDA: your quite right. This bird was in the first pond as you come in on the right. I did not see it when we entered the sanctuary but only noticed it when there were a crowd of people when we left. It flew from the pond up into a tree and I was quite a ways away from it when I took this picture. It is fairly heavily cropped to get it to this size. Looking at your signature it seems that you should have some great landscape opportunities. I was in Vancouver for a week and we had one day of sun. Oh well, we were there to see my grandson and it doesn't rain indoors! 


CFCrebel: He is a great son, he is my favourite for sure (does it count that he is my only son?) !

sugarzebra: Like I said this lens is my dream lens. There were a 1.4 and a 2X extender available, but I only used the 1.4 as most of the opinions I have read say that the drop in quality with the 2X is not worth the gain in distance.
There are a million reviews on this lens here so I will not go into any detail (I don't have the experience or technical ability anyway 
) on this. One point that I found aggravating was the location of the AF/MF switch. I found that I was often turning the switch off inadvertently, then wondering why the lens would not focus.
I think that this is still a compromise, with a 1.4X extender the fastest that I could shoot was f4.0, not much faster than you can get with the 100-400. I probably should have set the lens on a tripod for most of the outdoor shooting but the thrill of having the IS available was too much to resist. Even with the 1.4X on the lens, I think that it is still too short, I would have liked the extra 100mm for the great blue heron. I think that this is a great compromise if you can only afford 1 lens and you need the extra stop for indoors shooting. I have seen better examples of outdoors shooting with the 100-400L than what I have done here, but I would blame that on me rather than the lens. There is not much difference in weight between the two. In summary, if you are looking for a pure outdoors lens, then take the 100-400mm, if you have a need for a fast zoom lens for indoors that you can use outdoors then the 70-200 with the 1.4x is the way to go.
thanks all again,