Willow Tree Fen
Willow Tree Fen is a local nature reserve with an area of over located near Bourne and Spalding, south of the River Glen, England. The site was acquired by Lincolnshire Wildlife Trust in 2009 and converted from an arable field into a wetland fen.
The site was closed to the public in March 2020 as a result of the COVID-19 pandemic in England. In July it was announced that a pair of common cranes had successfully bred at the site; the first time the bird has bred in Lincolnshire for over 400 years.
