Texas Gardening: Hummingbird question, 1 by Fauther

Fauther wrote:
I've seen videos of feeders with many hummingbirds feeding at the same time. Why then, does this little bird spend all day chasing everything away from our feeder? Is it territorial, maternal or what? At the end of the day this little Buff-bellied hummer looks exhausted as he keeps vigil over HIS turks cap patch and feeder. The back yard is very shady and I'd like to plant something else at the other end of the yard that will attract humming birds and do well in shade. Any suggestions?