Guess Who's Visiting My Feeder

I put out a bird feeder this year - first for the hummingbirds and then for the bluebirds that are nesting in the bathroom vent and have succeeded in rearing three broods of offspring in a single season (and may be working on a fourth). They looked a little bedraggled so I thought they could use some food nearby. I was very pleased to see the levels of seed in the feeder going down with no squirrels around. Unfortunately, it was the big bird.