Access a dataset of over one million records, collected and verified by our members, covering 2000 to the present day.
Select a species to view a short species account and an overview of its monad (1 km square) distribution maps.
View data by individual Vice County or across all five of Yorkshire’s Vice Counties. Records can be filtered by year or by a range of years from 2000 to 2025.
The overall tetrad species richness is displayed for all species.
Click on a grid square to view its grid reference, site name, and a list of species recorded — along with the number of records within the selected time period.
Species gained and lost within each grid square are also indicated.
Overlays can be selected to display different base maps, from Satellite, Topographical to Street. A 10Km grid can be displayed along with each of the VC's with a mask. A number of priority habitat classes are also available as layers.
The presence of a record in a grid square does not imply that the site has public access. A number of our species are found on private land and we have been granted permission to go and record the presence of the butterflies. Please check before you enter a site that you have right of way to access.
Any questions please contact us at: [email protected]