This summer we have been really dilligent about keeping our hummingbird feeder clean and full of fresh nectar. I guess the word has spread quickly in the hummingbird community because I think we've got every hummer in a 3 mile radius coming to our feeder! They seem to be really territorial - constantly chasing each other away from the feeder. Their wings make them sound like giant bumblebees, and they also make this squeaky noise when they're chasing each other. They are so fun to watch! We have their feeder hung right outside our kitchen window so we can see them up close. BD has gotten some great shots of them in the past few days.