Ischnura evansi

[Regional assessment]
Status_ne_offStatus_dd_offStatus_lc_onStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_offStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA ARTHROPODA INSECTA ODONATA COENAGRIONIDAE

Scientific Name: Ischnura evansi
Species Authority: Morton, 1919
Common Name(s):
English Evans' Bluetail

Assessment Information [top]

Red List Category & Criteria: Least Concern (Regional assessment) ver 3.1
Year Published: 2010
Date Assessed: 2009-05-01
Assessor(s): Schneider, W. & Clausnitzer, V.
Reviewer(s): Dijkstra, K.-D.B., Clausnitzer, V., Suhling, F., Samways, M., Samraoui, B., Boudot, J.P., Kipping, J. & Allen, D. (IUCN Freshwater Biodiversity Unit) (IUCN Pan Africa Freshwater Biodiversity Assessement workshop, Cairo, 2009).
Justification:
The species is known from one record from Legrand (Dijkstra pers. comm.), from a lake on the border with Ethiopia and Djibouti. It is also present in Egypt (Siwa oasis area, where the records are relatively clustered), and may be present in suitable habitat in the surrounding areas in Libya and Sudan (Boudot pers. comm.). The species habitat (salt marshes and swampy areas) are common, and it is likely that the species is more widespread (Dijkstra, pers comm.), and is not endangered. It is assessed as Least Concern.

In northern Africa, Ishnura evansi is only recorded from Egypt (Siwa and El Quseima Oasis). Nothing known about the populations there, therefore the species is currently Data Deficient in the northern Africa region.

In northeasten Africa, the species is listed as Least Concern, as it is common in its range and there is no immediate threat obvious.

Geographic Range [top]

Range Description:Ischnura evansi ranges from Central Asia (Kyrgyzstan, Tajikistan) (Krylova 1972, Borisov 1984) through the Middle East (Schneider 1981, Dumont 1991) to the Libyan desert in the west (Kimmins 1950). It has also been recorded from Legrand (Dijkstra pers. comm.) in a lake on the border with Ethiopia and Djibouti. It is present in Egypt (Siwa oasis area, where the records are relatively clustered). The species habitat (salt marshes and swampy areas) are common, and it is likely that the species is more widespread Dijkstra, pers. comm.).

In northeastern Africa, the species is recorded from Egypt and Sudan (single record), Tsuda's listing for Djibouti is likely but needs verification. Occurrence in Eritrea and northern Ethiopia is assumed.
Countries:
Native:
Egypt (Egypt (African part)); Ethiopia; Libya; Sudan
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population: No detailed information is available for this species. It has a patchy distribution in the Mediterranean region and is locally abundant where it occurs. No population information is available from the northern Africa region.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: The larvae of the species tolerates high salinity (Schneider 1981) and is therefore often found in backwaters, irrigation/drainage ditches, saline marshes, and saline pools in oases. Because of similar requirements it is very often associated with its congeners Ischnura senegalensis and Ischnura fountaineae. It is also the only Ischnura species known to migrate (nocturnal), and such movements may account for the widely scattered distribution in the northern part of the eremian zone (desert zone) (Waterston and Pittaway 1991).

Found in oasis in western parts of northern Egypt, and in eastern Egypt along the Red Sea coast to Ethiopia.
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): No major threats are known at present. The species will tolerate higher saline conditions and may be more robust to drier conditions than other odonates.

Conservation Actions [top]

Conservation Actions: No specific conservation measures are needed in the wider Mediterranean region. In northern Africa, more data are required to be able to determine the range of the species in this area and the status of any populations there.

Bibliography [top]

Amr, Z.S., Katbeh-Bader, A. and Schneider, W. 1997. On the common Insecta of Al Azraq, Jordan. Entomologist's Gazette 48: 55-66.

Andres, A. 1928. The Dragonflies of Egypt. Mémoires de la Societé Royale Entomologique d'Egypte 3: 1-45.

Borisov, S.N. 1984. Seasonal variation in dragonflies (Insecta: Odonata). Izvestiya Akademii nauk Tadzhikskoi SSR (Biol.) 91: 68-70.

Dumont, H.J. 1977. A review of the dragonfly fauna of Turkey and adjacent Mediterranean islands (Insecta Odonata). Bulletin et Annales de la Société royale belge d’Entomologie 113: 119-171.

Dumont, H.J. 1980. The dragonfly fauna of Egypt and the role of the Nile in its origin and composition. Water Supply & Management 4: 29-34.

Dumont, H.J. 1991. Odonata of the Levant. The Israel Academy of Sciences and Humanities, Jerusalem.

Dumont, H.J. and Martens, K. 1984. Dragonflies (Insecta, Odonata) from the Red Sea Hills and the main Nile in Sudan. Hydrobiologia 110: 181-190.

Geene, R. 1994. Notes on dragonflies in Egypt, spring 1990. In: P.L. Meininger and G.A.M. Atta (eds), Ornithological studies in Egyptian wetlands 1989/1990, pp. 391-395 (Appendix III). Foundation for Ornithological Researech in Egypt, Vlissingen.

IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org. (Accessed: 2 September 2010).

Kalkman, V.J. 2006. Key to the dragonflies of Turkey including species known from Greece, Bulgaria, Lebanon, Syria, the Trans-Caucasus and Iran. Brachytron 10: 3-82.

Katbeh-Bader, A., Amr, Z. and Schneider, W. 2002. Odonata of Jordan. Fragmenta entomologica, Roma 34: 147-170.

Kimmins, D.E. 1950. Results of the Armstrong College Expedition to Siwa Oasis (Libyan Desert) 1935 under the leadership of Prof. J. Omer-Cooper. Bulletin de la Société Fouad Ier d'Entomologie 34: 151-157.

Krylova, W.N. 1972. Vertikale Grenzen der Verbreitung von Libellen im Tienschan (in Russian). In: A.I. Protsenko (ed.), Entomological investigations in Kirghizia, pp. 20-25.

Morton, K.J. 1924. The dragonflies of Palestine, based primarily on collections made by Dr. P.A. Buxton, with notes on the species of the adjacent regions. Transactions of the Royal entomological Society of London 72: 25-44.

Nelson, B. 1973. Azraq: Desert Oasis. Allen Lane, London.

Schmidt, E. 1938. Odonaten aus Syrien und Palästina. Sitzungsberichte der Akademie der Wissenschaften Wien, mathematisch-naturwissenschaftliche. Klasse, Abteilung I 147: 135-150.

Schneider, W. 1981. On a dragonfly collection from Syria. Odonatologica. 10: 131-145.

Schneider, W. 1986. Systematik und Zoogeographie der Odonata der Levante unter besonderer Berücksichtigung der Zygoptera. Biologie, Institut für Zoologie, Johannes Gutenberg-Universität.

Schneider, W. and Krupp, F. 1996. A possible natural hybrid between Ischnura elegans ebneri Schmidt, 1939 and Ischnura fountainei Morton, 1905 (Odonata: Coenagrionidae). Zoiology in the Middle East 12: 75-81.

Waterston, A.R. and Pittaway, A.R. 1991 (1989). The Odonata or Dragonflies of Oman and neighbouring territories. Journal of Oman Studies 10: 131-168.


Citation: Schneider, W. & Clausnitzer, V. 2010. Ischnura evansi. In: The IUCN Red List of Threatened Species. Version 2014.1. <www.iucnredlist.org>. Downloaded on 23 July 2014.
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