Woodlarks and nightjars breed on this site in internationally important numbers. There are also several nationally rare vascular plants and invertebrates on the IUCN Red List of Threatened Species. Geological sites provide evidence of the environmental and human history of East Anglia during the Middle Pleistocene.[8]
^"Barton Mills Valley". Local Nature Reserves. Natural England. 26 March 2013. Archived from the original on 28 April 2017. Retrieved 4 June 2017.
^"Breckland Forest citation"(PDF). Sites of Special Scientific Interest. Natural England. Archived from the original(PDF) on 4 March 2016. Retrieved 23 May 2017.