North Northumberland Bird Club
- Information about membership, activities and meetings, field trips, recent sightings, and news.
- http://www.northnorthumberlandbirdclub.co.uk/

The Northumberland and Tyneside Bird Club
- The club aims to provide members with news of local ornithological interest through monthly bulletins, the annual report for the area, Birds in Northumbria, and other occasional publications.
- http://www.ntbc.org.uk/

Berwick Wildlife Group
- Promoting wildlife in Northumberland and Berwickshire.
- http://www.berwickwildlifegroup.org.uk/

Northumberland Coast Area of Outstanding Natural Beauty
- Describes the landscape, wildlife and heritage of the area, with information about conservation, and for visitors.
- http://www.northumberlandcoastaonb.org/

Northumberland Wildlife Trust
- Manages over sixty nature reserves and aims to inform, educate and involve people. Includes species and habitat information, news, events, project details and links to local organisations.
- http://www.nwt.org.uk/

Northumberland Astronomical Society
- Details of membership, with meetings schedule, newsletter, and location details (Hauxley Nature Reserve).
- http://www.nastro.org.uk/