Wrens sleep in a variety of different places at night, depending on the species and the location. Some wrens will roost in tree cavities, nest boxes, or birdhouses, while others will roost in dense vegetation or in rock crevices. Some species of wrens, like the Winter Wren, are known to roost in dense underbrush or in the cavities of large trees, while the House Wrens often roosts in birdhouses or nest boxes, or in the cavities of trees, buildings or other human-made structures. Some wrens may also roost in dense vegetation, like shrubs or tall grasses.