Recording and studying wildlife and sharing the results of our work for the public benefit is the main focus of the YNU's activity.  The records we collect are shared with the local records centres in the Yorkshire and Humber Environmental Data Network as well as many national recording schemes, and are made publicly available via the National Biodiversity Network Atlas

It is absolutely vital that data and information about sites, species and habitats are used to inform environmental decision-making at a local level, notably forward planning, development control and the identification of sites of conservation importance.  This article from The Naturalist (140:1090 pp.187-189) explains the importance of an up-to-date evidence base to inform local decision making, and outlines the problems that can arise when data are not made available. 

The YNU believes that Open Access to biodiversity data is essential, except in cases where this might result in environmental harm.  The YNU signed the Bouchout Declaration for Open Biodiversity Knowledge Management in 2014.

Our recording area is the 'old' county of Yorkshire which consists of 5 vice-counties.  Click here to view or download a map of the area.

Online RecordingiRecord 360x600

The Yorkshire Naturalists' Union recommends the use of iRecord, which has superseded our old website recording system.

The goal of iRecord is to make it easier for wildlife sightings to be collated, checked by experts and made available to support research and decision-making at local and national levels.  Join iRecord and share your sightings with the recording community, explore dynamic maps and graphs of your data and make a real contribution to science and conservation.

Those wishing to continue to use the YNU's original recording software can access it by clicking here. These records will still be available to local environmental records centres and the national recording schemes. Please refer to our Data Policy for further information.          

Yorkshire's Local Environmental Records Centres:

Biological Records Officer


Bryological Section Meeting will be meeting at Jugger Howe. VC 62. Meet at 10:00 am at Helwath Bridge SE954995.

Contact: Tom Blockeel, Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

The National Forum for Biological Recording (NFBR) is hosting their annual conference online, on May 6th-7th this year. Click on the image below to visit their website, see the agenda and book your place


Meet in the Lounge at St Chad’s Parish Centre, Leeds, 10.30am to 12.30pm. TBC.

YNU Themed Zoom Sessions

Our autumn programme of themed Zoom events started on Thursday 16th September at 7.30pm when Mike Denton gave a presentation on Blackmoorfoot Reservoir (see below for recording details)

The programme of themed Zoom events continues on Thursday 14th October at 7.30pm when Prof. Alastair Fitter will give a presentation on The State of Yorkshire’s Nature. Alastair began lecturing in the Biology Department at York University in 1972, became a Professor in 1992, was elected a Fellow of the Royal Society in 2005 and became a CBE in 2010. His life-long interest and expertise in ecology makes him the ideal person to examine how Yorkshire’s wildlife is faring.


To register on Eventbrite for this event go to:   


‘Tickets’ will be available from 28th September 2021.


YNU Zoom Chat Sessions

YNU Zoom Chat Sessions (led by Judith Allinson) are resuming this autumn and will be held on the first Friday evening of each month at 7:30pm. They usually include two 7 minute talks with questions, as well as the main chat session. Details at This is open to members of the YNU and of affiliated societies.

The first one on 1st October will also function as a Zoom Natural Sciences Forum Meeting.


Recordings of future themed Zoom sessions will be available here:

The recording of Mike Denton’s Zoom session on The Natural History of Blackmoorfoot Reservoir (16 Sept. 2021) is available for viewing until 10 November by following this link:

You will need the Access Passcode: #1aDS5Bb