The **Eurasian wren** (Troglodytes troglodytes) typically roosts in **dark retreats, snug holes, and even old nests** during the winter months. These roosting sites provide essential shelter from cold weather and predators. In harsher conditions, they may gather in groups, often consisting of family members or multiple individuals, to conserve warmth[1][3][6].
They are known to utilize various habitats for roosting, including dense vegetation such as bushes, hedgerows, and brush piles. This adaptability allows them to find suitable roosting spots across a wide range of environments, from gardens and parks to more natural settings like forests and marshes[1][3].
Eurasian wrens (Troglodytes troglodytes) do use man-made structures for roosting in winter, including nest boxes. While they typically prefer natural roosting sites, they have been observed using artificial structures when available:
1. Wrens have been recorded roosting in large numbers in nest boxes during winter. In one instance, as many as 60 wrens were found roosting together in a single nest box[4].
2. They are known to use various man-made structures for shelter, including stone walls and even old nests[3][5].
3. Wrens often seek out "dark retreats" and "snug holes" for roosting, especially during harsh winter weather[3]. Nest boxes can provide such protected environments.
It's important to note that wrens are adaptable and will use a variety of roosting sites. They may roost alone or in groups, with communal roosting being a common strategy to conserve heat during cold winter nights[4]. While nest boxes are not their primary choice, they can serve as valuable artificial roosting sites when natural options are limited or during particularly harsh weather conditions.
