We first had the humming bird feeder in the background (look for the red in the lower right hand corner) beside the front porch. Then came our first hummer of the year, then another, then another...but one of the became greedy! He started standing watch and if any of the others came to feed, he would chase them off. So that necessitated a new feeder (in the foreground) outside our bedroom window. So far so good. The "sentinel" could not watch both feeders, so it appears "all is at peace"!