The Willow Warbler is an open nester that builds its nest directly on the ground, not in cavities.
Nest site: on the ground, well hidden among grass and low vegetation in deciduous woodland, birch groves, young forest and clear-fells with deciduous scrub.
Nest: a domed, oven-shaped nest with a side entrance, built of grass and lined with feathers.
Breeding: the female lays 5–7 eggs and incubates for 12–14 days, usually with one brood per season.
The concealed, ground-level nest is well suited to the Willow Warbler's life in deciduous-rich young forest and scrubland.