Wren/ren/ Definition 1 of 1Pro Tip 1/3Species Variation Wrens vary by species, and some have unique names like 'house wren'. I spotted a Carolina wren, not a house wren, in my backyard. Pro Tip 2/3Habitat Recognition Wrens can inhabit diverse environments, including gardens, woodlands, and marshes. The wren we saw was thriving in the marshland's dense reeds. Pro Tip 3/3Distinctive Sounds Wrens are known for their loud, complex songs, which can be helpful to identify them. Despite its size, the wren's song dominated the morning chorus.