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The following is a list of native plant and animal species which are found in Britain, but only at a single location.

This list is incomplete; you can help by adding missing items. (August 2008)

Key

Key to conservation designations for species:

• RDB - Red Data Book with three subdivisions
  • (cr) - critically endangered
  • (en) - endangered
  • (vu) - vulnerable
• W&CA 8 - Schedule 8 of the Wildlife and Countryside Act 1981

Key to conservation designations for sites:

• NNR - national nature reserve
• SSSI - Site of Special Scientific Interest

Currently found at just a single location

Non-vascular plants

Vascular plants

This section currently lists non-critical species and critical species in the smaller apomictic genera; many microspecies in the apomictic genera Hieracium (hawkweeds), Rubus (brambles) and Taraxacum (dandelions) are also found at just a single site each.

Invertebrates

Vertebrates

Birds

Notes

1. Common crane, although occurring in fluctuating numbers as a scarce spring and autumn migrant through Britain, with occasional individuals or pairs wintering or summering, has only established a single breeding population, in the Norfolk Broads (see Cranes in Britain for more details); the species was thought to be quite widespread in the Middle Ages, but the term 'crane' was also often applied to grey heron, making a reliable determination of historical status difficult.

References

1. Handley, R J; Davy, A J (2000). "Discovery of male plants of Najus marina L. (Hydrocharitaceae) in Britain". Watsonia. 23: 331–334.
2. Alexander, Keith (2009). In CISFBR (ed.). Red Data Book for Cornwall and the Isles of Scilly (2nd ed.). Praze-an-Beeble: Croceago Press. p. 217. ISBN 978-1-901685-01-5.
3. Dale, C W (1890). "Additions to list of Lepidoptera, Hymenoptera and Hemiptera". Penzance Natural History and Antiquarian Society. 3: 269–70.
4. Smith, Frank H N (1997). The Moths and Butterflies of Cornwall and the Isles of Scilly. Wallingford: Gem Publishing Company. ISBN 0-906802-07-5.
5. James, Tony. "Common Forest Looper Pseudocoremia suavis". UKMoths. Retrieved 28 December 2016.
6. Ray Gibson & Johnstone O. Young (1971). "Prostoma jenningsi sp. nov., a new British freshwater hoplonemertean". Freshwater Biology. 1 (1): 121–127. doi:10.1111/j.1365-2427.1971.tb01550.x.
7. The Wildlife Trust for Lancashire, Manchester & North Merseyside. "Memorandum submitted by The Wildlife Trust for Lancashire, Manchester & North Merseyside". House of Lords. Retrieved November 29, 2011.
8. Gainey Paul (2009). In CISFBR (ed.). Red Data Book for Cornwall and the Isles of Scilly (2nd ed.). Praze-an-Beeble: Croceago Press. pp. 525–8. ISBN 978-1-901685-01-5.
9. Turk, Stella (2009). In CISFBR (ed.). Red Data Book for Cornwall and the Isles of Scilly (2nd ed.). Praze-an-Beeble: Croceago Press. p. 524. ISBN 978-1-901685-01-5.
10. Marshall, James Taylor (1888). "Argiope decollata at Scilly". Journal of Conchology. 5: 361–2.

• Lists of biota of the British Isles