We returned home from Florida this past week, and I was surprised to find that I had some Big Browns already back for the summer. I couldn't see them in the house, so they must be high up. But the only droppings I saw on the ground were from Big Browns. This morning I checked the nursery house, and found 3 Little Browns in there.
I'm glad to see they're back. The Purple Martins haven't retuned yet, though.