A pair of wrens have a nest in the alcove of my back porch. They were here before we were. No reason to chase them off. In fact, I protected one of them one night when a very windy storm prevented them from getting back up to the nest until the next day.
My cherry tomato plant this year is back there. Every time I look out the window there's a wren by it. No birds have pecked at the plant. I realized this evening that the wrens are guarding it.
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It makes sense. The plant is within what the birds recognize as their territory. It's just that I know a lot of people who would have chased the birds off, not wanting wild birds on their back porch. I didn't, and now we help each other. I love my tiny feathered neighbors.