I had my first one of the season this week, creeping around a woodpile. They are a cold-weather wren, much darker than our ordinary House Wren which has pretty much migrated south by now.
Winter Wrens are are a bird of the Northeastern US and eastern Canada during breeding, most often seen in woodpiles, brush piles, and similar sorts of places. You need good eyes to see them but when they are in the mood they sing up a storm.
Have you seen one?
About Winter Wren