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UK Biodiversity Indicators 2023. Indicator C4b: Status of UK priority species (Distribution) 2023


This indicator was not updated in 2023. It was last updated in 2021.

These documents support state indicator C4b – Status of UK priority species (Distribution). The documents include a datasheet and a technical background document.

This indicator measures change in the number of one kilometre grid squares across the UK in which priority species were recorded in any given year. This is referred to as the ‘occupancy index’ and is effectively equivalent to changes in the distribution of priority species for which data are available. Priority species are defined as those appearing on one or more of the biodiversity lists of each UK country (Natural Environmental and Rural Communities Act 2006 - Section 41 (England), Environment (Wales) Act 2016 section 7, Northern Ireland Priority Species List, Scottish Biodiversity List). The combined list contains 2,890 species in total. The priority species were highlighted as being of conservation concern for a variety of reasons, including rapid decline in some of their populations. The indicator will increase when priority species become more widespread on average, and decrease when species become less widespread on average. This indicator should be read in conjunction with C4a which provides data on those species for which abundance data are available.

These resources may not be fully accessible for all users. If you need a copy of any of these resources in a different or more accessible format, please get in touch.

More information on UK Biodiversity Indicator C4b is available on the UKBI C4b webpage.

Resource type Publication

Topic category Environment

Reference date 2023·11·14

Department for Environment, Food and Rural Affairs, UK. 2023. UK Biodiversity Indicators 2023.

The UK Biodiversity Indicators were created to provide a measure for reporting on the UK’s progress towards meeting international biodiversity goals and targets and were first published in 2007.

Responsible organisation
Communications, JNCC distributor

Limitations on public access No limitations

Use constraints Copyright of data and/or information presented in these resources may not reside solely with the distributor (JNCC). For more information, please contact

Metadata date 2023·11·14

Metadata point of contact
Communications, JNCC

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