beautiful image Andrew !
but I have to say the ISO show up a bit, maybe the 1/1250 could have been reduced a bit, but I am being picky here
thanks for sharing
Your right that the noise does show through a little (seems a little cleaner in lightroom), though it is a reasonable crop of the original image (see attached) which makes it harder to hide the noise
The image was taken in overcast conditions in a forest and shooting in Av with light changing where ever you point the lens I was playing it safe at 3200. Maybe I should give the auto ISO a go as I have heard good things about it's operation on the 5D3.