1861 to the present...

Recording the ever-changing flora and fauna of Yorkshire for over 160 years.

We are an association of amateur and professional naturalists covering a wide range of aspects of natural history.

We study the 'old' county of Yorkshire, as individuals and through our many Affiliated Societies, many of which are local naturalists' groups. The YNU organises field meetings throughout the county, online presentations and discussion sessions as well as frequent conferences.  Visit our Events Page to find out more about YNU activities and how you can join in - everyone is welcome!

The YNU publishes three issues of The Naturalist, a County Bird Report and a Butterfly and Moths Report annually (in association with the Yorkshire Branch of Butterfly Conservation). These are all free to members. The YNU also publishes books on natural history subjects from time to time.

The five vice-counties which form the YNU's recording area are shown below.

To download a more detailed copy of the map - Click Here

Under normal circumstances the Yorkshire Naturalists' Union aims to run several exciting events and field meetings across the county every year (see below). This year Covid-19 has curtailed some of these but the programme of meetings currently planned can be accessed in the Events calendar.
The Yorkshire Naturalists' Union runs several exciting events and field meetings across the county every year, including:
  • Annual conference (material from recent conferences, including some of the speakers' presentations, are available for download from here). 
  • Annual General Meeting
  • Public events such as the Bioblitz at Scarborough in 2011 and the Festival of Ecology in 2013.  We regularly support bioblitzes and other public events run by other natural history organisations in Yorkshire.  In 2017 we took part in the BTO Yorkshire Conference, Leeds BirdFair, RES Insect Festival and Spurn Migration Festival.  Click here to download a useful guide to running a Bioblitz in Yorkshire.
  • Vice-county excursions.  Five field meetings per year at which members of all the different sections get together to record wildlife at a particular site in each of Yorkshire's five vice county. 
  • Field meetings organised by each Section to record wildlife in a particular species group or a particular habitat.
  • Field Skills Introduction - every year we run an introduction to field skills for MSc students at Leeds University. We are currently reviewing the situation for 2022.

All field meetings are free and non-members are very welcome to attend.  Dates and details of events can be found in the YNU membership card and on these web pages.


The YNU offers grants on a biannual basis to institutions or individuals who wish to undertake work that furthers the aims of the YNU. For details, download the YNU Grant Guidelines document here and a YNU Grant Application Form here . Alternatively, contact the Membership Secretary at c/o NEYEDC, 10a Minster Gates, York YO1 7HL (This email address is being protected from spambots. You need JavaScript enabled to view it.).