Biological recording in general

• Keiron Brown's Biological Recording Company website including guidance on the basics of biological recording and a Biological Recording Blog featuring a huge range of biological recording initiatives with excellent overviews and information on how to take part.
• Martin Harvey's 'kitenet' website has some extensive biological recording pages
• Guide to surveying wildlife from the Chilterns Conservation Board
• The National Biodiversity Network provides a database of UK biological recording projects.

Local Environmental Records Centres and County Ecologists

• Association of Local Environmental Records Centres - The Association represents the interests of Local Environmental Records Centres in the UK, promoting standards and services in biodiversity and geodiversity data collation and service provision. Provides a map link to find details of your local records centre.
• ALERC Forum - discussion forum for local record centres
• Association of Local Government Ecologists - represent professional ecologists working in local government in the UK

National Recording Schemes

• Biological Records Centre provides a list of terrestrial recording schemes with links to each scheme’s website
• The Marine Sightings Network provides a list of marine recording schemes with links to each scheme’s website; see also The Marine Biological Association

Local Natural History Societies

• The Natural History Museum provides a list of local natural history societies with links to each society’s website:  Nature Groups Near You

Species Status Reviews

• UK Conservation Designations is a spreadsheet provided by JNCC which collates the conservation designations of over 11,660 UK taxa
• Natural England Species Status Review Reports

Museums

• NatSCA - The Natural Sciences Collections Association (NatSCA) is the UK's organisation for representing Natural Science Collections and associated museum staff, and for communicating all relevant developments and news - see also Natural History Collections Near You.
• Fenscore - The Federation for Natural Sciences Collections Research was set up in 1980 to co-ordinate the activities of regional groups of curators in the UK who then were beginning to survey natural science collections in their areas.

Scotland

• The Scottish Biodiversity Information Forum (SBIF) was established in 2012 with the aim of benefiting Scotland's biodiversity by improving the flow and use of biological information.
• Biological Recording In Scotland (BRISC) is a charity which promotes biological recording to increase public awareness of Scotland's biodiversity.

Sources of Biodiversity and Environmental Data

• iRecord is an online recording website (and apps) - you can add your own records (which are made immediately available to participating recording schemes and records centres) and you can see what others have been recording.
• The NBN Atlas provides access to over 100 million species occurrence records, as well as habitat, site boundary and taxonomic information
• Aderyn provides access to the more than 10 million species records held by the LERC Wales consortium.
• The Global Biodiversity Information Facility (GBIF) provides access to over 570 million species occurrence records worldwide
• The Marine Environmental Data and Information Network (MEDIN) Data Discovery Portal catalogues the biological and other environmental data held by MEDIN's accredited Data Archive Centres
• NERC Data Centres
• Centre for Ecology and Hydrology's Environmental Information Platform provides access to visualise and interrogate diverse environmental datasets held by CEH
• UK Species Inventory - The Natural History Museum’s UK species inventory aims to compile the names of all UK species from a series of comprehensive and authoritative checklists. 
• GB Non Native Species Information Portal provides distribution data and other useful information about all non-native species in GB
• The UK Environmental Observation Framework (UK EOF) Catalogue collates information about environmental observations undertaken and funded by public and third sector organisations
• The Encyclopaedia of Life (EOL) is a portal to information and images of species worldwide
• The Ocean Biogeographic Information System (OBIS) is a global resource for distribution data on marine species
• Biodiversity Data Journal is a peer-reviewed open access journal for the publication of biodiversity data
• Biodiversity Heritage Library provides free access to biodiversity publications and provides the literature component to EOL.
• Arkive is a freely accessible global online library of  wildlife images and videos
• The IUCN Red List of Threatened Species is a publicly searchable database of over 76,000 species whose conservation status has been assessed
• MS BIAS - Marine Species of the British Isles and Adjacent Seas

Identification Resources

• iSpot is a friendly and free community helping to identify wildlife and share nature
• The Field Studies Council's Tomorrow's Biodiversity ID Signpost is a searchable database of ID resources, which is kept updated by the community
• TaxonAid is an online tool dedicated to improving techniques in taxonomic identification, showcased at the 2015 NFBR Conference
• Insect Rambles Blogspot - a list of links to online resources for species ID across multiple taxa collated by NFBR member Richard Comont

Training Courses

• The Linnean Society have published a list of course providers in identifying and classifying organisms: http://www.linnean.org/Education+Resources/Lifelong+Learning
• The Field Studies Council runs courses on identifying and recording species and habitats for all levels of experience
• Manchester Metropolitan University runs courses in Biological Recording and Species Identification in association with the Field Studies Council, the Botanical Society of the British Isles and the Freshwater Biological Association.
• The Chartered Institute of Ecology and Environmental Management runs continuing professional development courses in species identification and survey methodology.
• The British Entomological and Natural History Society runs expert-led indoor workshops to discuss and demonstrate fieldcraft, curation and identification techniques.
• The Biological Recording Company offers a range of training courses and services.

Free Open Source Technology for Biodiversity Data

• Indicia is an open source toolkit which has been used to build hundreds of wildlife recording websites and apps, including iRecord
• QGIS is a free and open source geographic information system (GIS)
• QGIS plugin for biological recorders was developed as part of the FSC's Tomorrow's Biodiversity project and showcased at the 2015 NFBR conference
• rNBN and SPARTA are packages for extracting data from the NBN database and analysing trends in un-structered species occurrence datasets using the free open source software environment, R.

DNA barcoding

• Barcode of Life
• GenBank
• Bento Lab "DNA-enabling" UK field mycologists to discover new species and DNA barcode fungal biodiversity