Aderyn :: Home

Welcome to Aderyn: the Biodiversity Information and Reporting Database of Local Environmental Records Centres Wales. Here you can access wildlife sightings and species records collated by the four LERCs, covering the whole of Wales. Anyone can use this site to view lists of species recorded around their home or maps showing the distribution of species according to data held by LERC Wales. Partners, recorders and planners can be licenced to access high resolution, detailed records to assist decision making and conservation.

What's in my Area?

Ever wondered what species have been seen near your house, school or workplace? This page allows you to find out! Using the map, you can navigate to the location you are interested in, select a 1km grid square, and return a summary of all species for that square (excluding sensitive species).


Distribution Maps

This page allows you to see where LERC Wales holds records for a specific species or taxon group (eg birds) across Wales? Select a species or an entire taxon group and display a 10km distribution map, then select a 10km square and see a 1km distribution map (excluding sensitive species).



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Access to Aderyn is subject to terms and conditions. By logging in you indicate your agreement with and willingness to abide by these terms and conditions.

Submit a Record

We are always delighted to receive data from local wildlife recorders, and each LERC has their own online recording tool for this purpose. Please click on the links below to be taken to the relevant recording page. If you are unsure which LERC you live in, please use the Find Your Local Environmental Records Centre tool on the LERC Wales website.

If you have a large amount of data, or prefer to submit records in another format, please contact the relevant LERC to decide the best method of submission. Alternative methods include Excel, MapMate and paper formats.

Holly blue (<i>Celastrina argiolus</i>) Myathropa florea Hoverfly Black Darter Small long-horn moth, Nemophora minimella, Common Blue Butterfly Female Pearl-bordered fritillary, Boloria euphrosyne Hoverfly - Eupeodes Latifasciatus Emerald damselfly, Lestes sponsa Ruddy darter, Sympetrum sanguineum Common hawker, Aeshna juncea Peregrine Trout (<i>Salmo trutta</i>) Oak bush cricket, Meconema thalassinum Pellucid hoverfly, Volucella pellucens, Sallow Moth Comma Goldfinch Migrant Hawker White-legged Damselflies Beautiful demoiselle, Calopteryx virgo <i>Agonopterix sp.</i> Elephant Hawk-moth Common Hawker Hoverfly (Syrphus genus) The Gaul (<i>Aspilapteryx tringipenella</i>)