Zeldzame libellen in Nederland in 2002-2005 CWNO Mededeling 4

Bosch, J.G. van ‘t, 2011. Rare dragonflies in the Netherlands in 2002, 2003, 2004 and 2005, CWNO-reports 4. Brachytron 14(1): 40-47. This is the fourth report of the Dutch Committee for records of rare odonates (CWNO). In this report, records from the period 2002-2005 are reviewed. Acceptability is judged independently by each of the committee members, based on the documentation available (e.g. descriptions, drawings, pictures or collected material). Only accepted records are reviewed. Of each accepted record the Province, nearby city, location, date, number, gender and observers are given. In most cases only the first record is given; subsequent records of the same individual or population are accepted on the basis of the first record and are not reviewed. From this record on, observations marked with an asterisk *, are regarded as a 'known location'. New records from a known location will not be reviewed in future. The three categories of species that are considered by the CWNO are described. The third category is a new one: only proof and indication of reproduction are currently considered for Anax parthenope and Aeshna affinis. Species that are no longer considered by the CWNO are Crocothemis erythraea (after 2003) and Orthetrum coerulescens (after 2006). Records of these species in 2002-2005 are not reviewed in this article. 2002 – A new population of Sympetrum depressiusculum was discovered near Budel (Noord-Brabant/Limburg). Several new populations of Somatochlora flavomaculata were found. 2003 – The most spectacular discovery in 2003 was the first observation for The Netherlands of Coenagrion scitulum near Tegelen (Limburg), Subsequent searches did not result in additional observations. The fourth ever observation (fifth individual) of Anax ephippiger for the Netherlands was at Schiermonnikoog (Friesland). The fourth population of Somatochlora arctica was discovered at Vragenderveen (Gelderland). 2004 – The most memorable in 2004 was the third ever observation for The Netherlands of Sympetrum meridionale, at Cadzand-bad (Zeeland) 2005 – The most spectacular event in this four-year period was without doubt the discovery of a population of Leucorrhinia albifrons near Oldeberkoop (Friesland). The previous observation was a single male in 1994 at nearby Appelscha. The fourth ever observation of Sympetrum meridionale was at Berghem (Noord-Brabant). The fifth population of Somatochlora arctica and the first population for Overijssel was discovered at Landgoed Twickel.