Literally just that. A little brown wren is a cute little bird who is a bit shy like most birds.
If one comes in your house it's a safe bet that it's mate. Is nearby. Little brown wrens. Like to eat birdseed berries and bugs. They will light on anything where they can perch. When it gets dark they will roost until it's daylight. They love indoor plants and picture frames as well.
We had a little brown wren come in the house the other day. It took a nap under the bed and in the closet.
Taking a shit in a ladies hooded gown then tying the hood to her head via the pull cords and feltching her face until climax
"I'm about to get me a little brown riding hood"