Bursting Buds - Red Maple Trees

As I continue on my mission to examine Bursting Buds, I am intrigued by the Red Maple trees. I have found that the Red Maple tree stem in the bird feeding station has only male flowers. Most of the flowers have fallen off, although you can see a few remaining. The leaves are now developing.

While the Red Maple tree in the triangle garden, off the front deck, has only female flowers and now has winged seeds developing. I also learned that Maple trees can have both male and female flowers on the same tree, although that isn't the case in the two trees that I am studying.