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Oxygastra curtisii

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA ARTHROPODA INSECTA ODONATA NOT ASSIGNED

Scientific Name: Oxygastra curtisii
Species Authority: (Dale, 1834)
Common Name(s):
English Orange-spotted Emerald
French Cordulie à Corps Fin

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2006
Date Assessed: 2006-01-31
Assessor(s): Boudot, J.-P., Riservato, E. & Hardersen, S.
Reviewer(s): Clausnitzer, V. & Suhling, F. (Odonata Red List Authority)
Justification:
Given present knowledge, this species currently is not threatened in its favoured geoclimatic area (southwest France and northwest Iberia). However, extensive water quality degradation and large-scale stream transformations (alteration of structure and functioning) constitute a future threat. In the rest of its range area, the species has been lost from the UK and The Netherlands, has clearly declined in Belgium, and remains very rare in Germany. From the literature, it is scattered over only 20 streams and lakes in Italy and only three localities have been published here since 1990 (D'Andrea 1994: east Arezzo in the Apennines, Utzeri et al. 1999: northwest Roma, Hardersen, 2004: Lombardia), most likely due to lack of searches than to strong regression of the species. Much more recently, the species was discovered in two new localities in Lombardy (Dr. Elisa Riservato, Univ. Pavia, in litt.).

The overall known population is stable only because localities that have been lost in northwestern Europe are balanced by those recently discovered in Iberia and northern Italy. A quasi-general decrease is to be expected almost anywhere in the future (but much less so in a large part of the southwestern half of France and northwestern Iberia than elsewhere, due to both mountainous features and a lower agricultural pressure), owing to water management and pollution, irrigation, global warming and subsequent frequent summer drought and stream drying. The Near Threatened category is presently recommended.
History:
1996 Vulnerable
1994 Vulnerable (Groombridge 1994)
1990 Vulnerable (IUCN 1990)
1988 Vulnerable (IUCN Conservation Monitoring Centre 1988)
1986 Endangered (IUCN Conservation Monitoring Centre 1986)

Geographic Range [top]

Range Description: Southwest Europe. Very rare in North Africa.
Countries:
Native:
Belgium; France; Germany; Italy; Luxembourg; Morocco; Portugal; Spain; Switzerland
Regionally extinct:
Netherlands; United Kingdom
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Very rare in Germany, Belgium, Luxembourg, Switzerland and Morocco. Uncommon in Italia, northeastern and eastern France, rather common to common in the southwestern half and the Mediterranean fringe of France. Scattered with a mean rather low density over the whole Iberian Peninsula, but decidedly much more present in the west than previously believed. Regionally Extinct in the United Kingdom (last recorded there in 1957) and The Netherlands.
Population Trend: Stable

Habitat and Ecology [top]

Habitat and Ecology: Slow flowing streams; pools and ponds.
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): Water pollution, stream calibration.

Conservation Actions [top]

Conservation Actions: Control of water pollution, conservation of "natural" stream structure, Alder trees bordures and pathway.

Citation: Boudot, J.-P., Riservato, E. & Hardersen, S. 2006. Oxygastra curtisii. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 25 July 2014.
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