A group of white storks born and raised as part of a rewilding initiative in Sussex have been observed building a “practice nest” near Guildford, marking a significant step toward re-establishing the species in the UK. The development suggests that these birds could start breeding and raising chicks in the region within the next few years.

The Knepp Estate in West Sussex has been leading efforts to reintroduce white storks to southeastern England since 2016. White storks disappeared from the UK around the 15th century, largely due to intensive hunting and habitat destruction, including drainage of floodplains and marshes to accommodate expanding agriculture and urban areas.

The current flock near Guildford comprises 10 individuals, including two wild birds that recently joined the group. Laura Vaughan-Hirsch, manager of the White Stork Project, described the nest-building activity as a “major milestone.” She explained that the observed birds are still young and typically begin breeding at around four years of age. She suggested the nest is likely a practice effort that will be used to raise offspring in the coming breeding season.

Last year, the Knepp Estate reported 45 fledged storks successfully departing their nests before migrating for the winter. The birds are expected to return in spring, when some may attempt to rear chicks for the first time on the new nests.

The project represents one of the most ambitious attempts to restore a species lost from the UK for centuries and could have broader implications for habitat restoration and biodiversity in the region. The return of white storks would not only signal progress in conservation efforts but also contribute to revitalizing natural floodplains and other ecosystems once prevalent across southern England.