Sunday 19 May
Stiletto fly (Cliorismia rustica)
What’s the World’s Favourite Species?Find out here.
Stiletto fly fact file
- Find out more
- Print factsheet
Stiletto fly description
- Psilocephala rustica.
- Length: 10-11 mm (2)
- In arthropods (crustaceans, insects and arachnids) the abdomen is the hind region of the body, which is usually segmented to a degree. In crustacea (e.g. crabs) the limbs attach to the abdomen; in insects the limbs are attached to the thorax (the part of the body nearest to the head) and not the abdomen. In vertebrates the abdomen is the part of the body that contains the internal organs (except the heart and lungs).
- Stage in an animal's lifecycle after it hatches from the egg. Larvae are typically very different in appearance to adults; they are able to feed and move around but usually are unable to reproduce.
- Part of the body located near the head in animals. In insects, the three segments between the head and the abdomen, each of which has a pair of legs.
- National Biodiversity Network Species Dictionary (August 2002) http://www.nhm.ac.uk/nbn/
- Environment Agency (2000) Focus on biodiversity. The Environment Agency, Bristol.
- UK BAP Species Action Plan (August 2002): http://www.ukbap.org.uk
- view the contents of, and Material on, the website;
- download and retain copies of the Material on their personal systems in digital form in low resolution for their own personal use;
- teachers, lecturers and students may incorporate the Material in their educational material (including, but not limited to, their lesson plans, presentations, worksheets and projects) in hard copy and digital format for use within a registered educational establishment, provided that the integrity of the Material is maintained and that copyright ownership and authorship is appropriately acknowledged by the End User.
Stiletto fly biologyTop
Stiletto fly range
In Great Britain, this species is recorded predominantly from the Welsh Marches, including the rivers Usk and Monnow. It is also recorded from a few isolated sites in West Sussex and north-eastern Yorkshire. There have been very few new sites discovered in recent years despite increased recording effort, furthermore it seems that it has been lost from a few former sites (2). Although the European distribution is broad, the status of this fly is not clear (2).Top
Stiletto fly habitat
Occurs around lowland rivers; adults inhabit sandy riverbanks where ridges of sand have formed. Alders or other trees and bushes are present to provide shade, but the species also appears to require bare sand in sunny areas (3).Top
Stiletto fly status
Classified as Rare in Great Britain (3).Top
Stiletto fly threats
Main threats facing this species appear to include the removal of sands and gravels from rivers and their banks for use as aggregate, as well as deepening and canalisation of rivers, and water abstraction resulting in decreased river flow (3).Top
Stiletto fly conservation
This stiletto fly is a UK Biodiversity Action Plan (UK BAP) priority species, and a Species Action Plan has been written in order to outline action required to conserve it, with the over-riding aim being the maintenance of all current populations (3). The organisation responsible for the delivery of these actions (the 'lead partner') is the Environment Agency. Future work on this fly will aim to determine the ecological requirements and distribution of the species more precisely, and to produce guidance on sympathetic river management (2).Top
Find out moreTop
Information authenticated by the Environment Agency:
MyARKive offers the scrapbook feature to signed-up members, allowing you to organize your favourite ARKive images and videos and share them with friends.
Terms and Conditions of Use of Materials
Copyright in this website and materials contained on this website (Material) belongs to Wildscreen or its licensors.
Visitors to this website (End Users) are entitled to:
End Users shall not copy or otherwise extract, alter or manipulate Material other than as permitted in these Terms and Conditions of Use of Materials.
Additional use of flagged material
Green flagged material
Certain Material on this website (Licence 4 Material) displays a green flag next to the Material and is available for not-for-profit conservation or educational use. This material may be used by End Users, who are individuals or organisations that are in our opinion not-for-profit, for their not-for-profit conservation or not-for-profit educational purposes. Low resolution, watermarked images may be copied from this website by such End Users for such purposes. If you require high resolution or non-watermarked versions of the Material, please contact Wildscreen with details of your proposed use.
Creative commons material
Certain Material on this website has been licensed to Wildscreen under a Creative Commons Licence. These images are clearly marked with the Creative Commons buttons and may be used by End Users only in the way allowed by the specific Creative Commons Licence under which they have been submitted. Please see http://creativecommons.org for details.
Any other use
Please contact the copyright owners directly (copyright and contact details are shown for each media item) to negotiate terms and conditions for any use of Material other than those expressly permitted above. Please note that many of the contributors to ARKive are commercial operators and may request a fee for such use.
Save as permitted above, no person or organisation is permitted to incorporate any copyright material from this website into any other work or publication in any format (this includes but is not limited to: websites, Apps, CDs, DVDs, intranets, extranets, signage, digital communications or on printed materials for external or other distribution). Use of the Material for promotional, administrative or for-profit purposes is not permitted.