Competencies for Species Survey (CSS)

These set the criteria for the knowledge, skills and experience required by ecologists undertaking a range of species survey work in a professional capacity. The Guidance currently covers a range of terrestrial and freshwater species. An overview of the guidance is also available.

The guidance for each species survey can be downloaded below:


Barn Owl


Brown Hare and Mountain Hare

Eurasian Otter

Great Crested Newt

Hazel Dormouse


Natterjack Toad

Pine Marten


Red Squirrel



Water Vole

White-Clawed Crayfish

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