Territorial Ruby-Throated Hummingbirds

We have four ruby-throated hummingbirds fighting over food and territory in our yard, this year. I don't know why they do this, as we go out of our way for them so they won't. We have a bunch of large hummer and butterfly friendly gardens for them to choose from, as well as four hanging baskets full of tempting petunias. Two neighbors also have feeders up, and this August we added a second feeder on the other side of the house. Still, they fight in the gardens, at the baskets, and around the feeders. But we still love them, and their antics! They will surely--and sorely!--be missed when they head south for the winter. --LKR