The feeders are buzzing, actually humming with Humming birds. They were absent for a while and are now back with their young. They are very territorial as you can see from the video. Hanging out on the feeders and chasing away visitors. Kinda looks like a game of "tag" or "capture the flag"
To attract Hummingbirds use a feeder with some red on it, don't color your water. Use a dissolved solution of 1 part sugar to 4 parts water. Be sure to thoroughly clean feeders in between with vinegar and water, do not use soap. Fill feeders as needed and when they turn cloudy.
I put my feeders out around the 1st of May so when they return to our area there is food ready for them, plus then they like me best rather than my neighbors. My mother would say be sure to have the appetizers ready before the guests come.