Here is a short story about my favorite Wren.

Wrens are wonderful little birds, and I love listening to them. They have a way of repeating the same "word" sound over and over 4-5 times in a row. Then they stop, wait a minute and start it over again. After they have repeated the same word for several of the repeat sessions; they usually change words, and then start repeating that word.
They seem to be friendly little birds as well. We lived in a trailer house out in the country, and in the summer, when we had the door and windows open, the wrens would take a shortcut in through the bathroom window, across the hall, and then out the back door on the other side of the trailer.
Sometimes they actually flew into the living room, and landed on the curtains, and then they would peer around the house for a bit, and then fly back out again.