It's hard to get a shot of bluebirds, they don't come to the bird feeder and prefer insects instead.

Study these 4 birds closely and you can see one bird type morph into the other as you move clockwise.

From top left, Male Lesser Goldfinch, Female House Finch, Male House Finch, Female Lesser Goldfinch

Here's what a "country" parking lot looks like. Just like in the city plants seem to grow where they want and not where you plant them. In this case, it is OK!