riverhumber.com
- Photographs, maps and general information covering Hull area including the Humber Suspension Bridge.
- http://www.ktaylor297.karoo.net/

North & East Yorkshire Ecological Data Centre
- Profile, services and biodiversity data.
- http://www.neyedc.co.uk/

Yorkshire Moths
- A group monitoring moths in the county; includes a monthly guide to species sightings, and a Yahoo! group.
- http://www.yorkshiremoths.pwp.blueyonder.co.uk/

Yorkshire Branch of the British Dragonfly Society
- Information about membership and activities, with a listing of species found in the county
- http://www.davidmiller007.demon.co.uk/dragonflies/

Yorkshire Butterfly Conservation
- Dedicated to the conservation of butterflies and moths in the county. Includes species listing, reported sightings, advice for gardeners, and information about their trips, activities, and membership.
- http://www.yorkshirebutterflies.org.uk/

Yorkshire Naturalists' Union (YNU)
- An umbrella organisation for natural history societies in the county of Yorkshire; includes their activities, publications, membership, and information about the natural history of Yorkshire
- http://www.ynu.org.uk/

Yorkshire Geological Society
- Information about membership, activities, publications and organisation.
- http://www.yorksgeolsoc.org.uk/

Yorkshire Mammal Group
- Aims to promote the scientific study of mammals and to encourage a wider public interest in them. Includes background information, and details of meetings and field walks.
- http://www.raysolve.co.uk/ymg

Yorkshire Beekeepers' Association
- Represents 23 District Associations. Programme of events, and noticeboard. Offer to local beekeepers to mount their own web-page.
- http://www.yorkshirebeekeepers.org.uk/index.htm

English Nature - Yorkshire & The Humber Nature Reserves
- The statutory service responsible for looking after England's variety of wild plants and animals - the country's biodiversity - and its natural features.
- http://www.english-nature.org.uk/maps/region.asp?Reg=3

The Yorkshire and Humber Biodiversity Forum
- Information on the partner organisations and the regional biodiversity audit they have completed. Wildlife news, species gallery, and reports.
- http://www.yhbf.org/

Yorkshire Wildlife Trust
- Conserving and promoting the diversity of Yorkshire wildlife and habitats for the benefit and well-being of both wildlife and people. A registered Charity.
- http://www.yorkshire-wildlife-trust.org.uk