Neat! We've got tons of hummingbirds in our backyard, we have a feeder for them stuck on our kitchen window which they come to a lot, plus they drink from the flowers on the big Rose of Sharon 'tree' and the lantana bush. I've never seen any nests but I would be willing to bet that there's at least one nest in that big 'tree'. They are strange creatures, very vocal and very territorial. I think they yell at us when we're out in the yard sometimes, it doesn't sound friendly.