I took that photo through my telescope, at 45 power, from 175' away through a window. I'm going to try for a better one when I get full sunlight, hopefully tomorrow.
Canadian geese normally nest on the ground, but when we searched for information about Canadian geese nesting in a tree, we found plenty of other examples – so this isn't quite as weird as we thought it was :)
Debbie's first question: how are the goslings going to get down to the ground from up there? My guess: they get pitched out like wood ducks do with their babies, and they bounce when they hit the ground. I hope we manage to catch that event!
