I think the reason people hesitate to identify bushes is because the size and location make a big difference as to what they could be
For instance, the bush which was identified as a burning bush, which by the way is Euonymus Alata, Thats a good guess but up in our neck of the woods, they never grow twice as big as your tractor ( see picture) On the other hand maybe they do where you are. It could also be a viburnum opulus which up here grows to be about 8 feet tall but only gets red in the fall. May be what we need is a few more details about location and season >?
Or may be I'm getting too old to remember all my botanical training or just maybe getting too old
You are right, the first burning bush was exceptioally large but I just had to take a pic of it because the color was so vivid.
The second pic is a row of driveway trees that will change to red if the frost doesn't hit them too hard.
The third pic is a more normal burning bush size.
All of these are normally green until the fall when they turn red. I don't know the proper names but they can be spectacular in the fall.
Take care and hope to see some Prairie pics soon.