Hummingbirds at the feeder

I've been feeding the wildlife on the deck. This year we have about 12-14 resident hummingbirds that come for the free meal (refilling this small feeder twice a day). They are not as aggressive at the feeder yet because they are nest mates and get along for now. Later in the summer they will begin to be more territorial and I won't see such large groups feeding together. We have Rufus and Black chinned Hummingbirds.