Category Archives: News

Update of the list of IAS of Union concern

The European Commission has published an update of the list of invasive alien species of Union concern in the Official Journal on July 13th 2017:

The webpage has been updated accordingly and includes a new brochure on all 49 species (at the moment only available in English pdf format):

The JRC report on the baseline distribution of the 37 species on the first list is available here: entation/Baseline

Communicated on July 13th 2017 by the IAS team of DG ENV, European Commission

2016 Mosquito survey catches determined

In 2016, the Luxembourg National Natural History Museum has started a survey on mosquito species in Luxembourg. Between July and October mosquitoes have been weekly trapped on 10 sites throughout the country, in co-operation with local and regional partner organizations and private persons.

On June 14th and 15th 2017, Mosquito specialist Dr Francis Schaffner from University of Zurich determined the 2016 catches at the Museum.

F.l.t.r.: Svenja Christian (Department of Invertebrates Zoology MNHNL) and Dr Francis Schaffner (University of Zurich) in the Lab of the Department of Ecology. Photo: Dr Christian Ries, MNHNL, 15 June 2016.


182 mosquitoes were caught during 90 catches from 10 sites.

Culex pipiens / torrentium (9 out of 10 sites)
Anopheles plumbeus (Kockelscheuer, Steinsel)
Culiseta annulata (Remerschen)
Coquillettidia richiardii (Remerschen)
Aedes vexans (Kockelscheuer)
Aedes cinereus (Kockelscheuer) 1

Locality, Partners (#Catches|#Specimen)

We thank the following partners who have run the traps on their sites.

  • Diekirch, Administration de la nature et des forêts (11|0)
  • Esch-sur-Sûre, Naturpark Öewersauer (PNHS) (12|9)
  • Kalborn-Moulin, natur&ëmwelt – Fondation Hëllef fir d’Natur (10|6)
  • Kockelscheier, natur&ëmwelt – Haus vun der Natur (11|48)
  • Leudelange, private owner (10|27)
  • Lintgen, private owner (9|23)
  • Luxembourg / Grund, MNHNL (11|19)
  • Remerschen, Biodiversum (5|16)
  • Schrassig, private owner (6|24)
  • Steinsel, private owner (5|10)

First observation of Impatiens balfourii in Luxembourg

Impatiens balfourii. Luxembourg, Kirchberg. Photo: Roland Proess, 5 August 2016.

Impatiens balfourii Hook.f. was first observed in Luxembourg, in the wild, in 2016, on the edge of the Kirchberg plateau by Roland Proess. It is at present just considered to be subspontaneous, it may however have the potential of getting naturalized in Luxembourg due to climate change.

Yves Krippel & Roland Proess have written a detailed article on the subject which was submitted to the next edition of the Bulletin of the Luxembourg Naturalist Society:

  • Krippel, Y. & R. Proess, [submitted]. Impatiens balfourii Hook. f. (Balsaminaceae), nouvelle espèce subspontanée au Luxembourg ?! Bull. Soc. Nat. luxemb. 119.

Impatiens balfourii has been assessed today according to the ISEIA protocol by Yves Krippel and Christian Ries: B1, Watch list.

Two other invasive alien balsam species occur in Luxembourg: the Himalayan balsam (Impatiens glandulifera Royle), one of the most common and widespread invasive neophytes in Luxembourg, and the small balsam (Impatiens parviflora DC.), which is widespread in forest ecosystems across Luxembourg.

New up to date distribution maps on

Distribution map of Procyon lotor Linnaeus, 1758 in Luxembourg. Recorder database, MNHNL, 19.09.2017.

The distribution maps on are from now on up to date. Every time a page concerning a species present in Luxembourg is viewed, the distribution data are retrieved on the fly by a query sent to the recorder database of the Luxembourg National Museum of Natural History.

These data are saved on the server in GPX format and displayed using the OSM (Open Street Map) WordPress plugin.

IAS coordination group for Luxembourg created by Ministerial Order

On 21 November 2016 the Minister for the Environment Carole Dieschbourg signed the Ministerial Order creating a coordination group for invasive alien species in Luxembourg, which was published in the Memorial on 28 November 2016.

Arrêté ministériel du 21 novembre 2016 portant création du groupe de coordination sur les espèces exotiques envahissantes au Luxembourg. Mémorial B – N° 121 du 28 novembre 2016. (PDF 29 KB)

Publication of a leaflet on Ambrosia artemisiifolia

In autumn 2016 the Department for the Environment of the Luxembourg Ministry of sustainable development and infrastructures edited a leaflet in German and French about Ambrosia artemisiifolia, in co-operation with the National Museum of Natural History and efor-ersa ingénieurs-conseils. It can be downloaded here in PDF format (4 MB each).

More information on the Common Ragweed in Luxembourg can be found in it’s dedicated article on this website.

flyer-cover-de   flyer-cover-fr

Information leaflet on Vespa velutina

Vespa-velutina-flyer-1st-pageThe Asian predatory wasp (Vespa velutina), also known as the Asian Hornet or yellow-legged hornet, is a species of hornet indigenous to Southeast Asia, particularly the tropical regions, from Northern India, Pakistan, Afghanistan, Bhutan, China, Taiwan, Burma, Thailand, Laos, Vietnam, Malaysia, the Indo-Chinese peninsula and surrounding archipelagos.

As an invader in Europe the hornet has appeared in France, Spain, Portugal. Further invasions are expected in various countries including much of Europe.

As it is currently spreading from South towards the North of France, we expect this wasp species to arrive in Luxembourg quite soon. This is why a leaflet was produced to enable people and especially bee keepers to identify the species and report its presence to the authorities.

Download the leaflet in PDF format (3,2 MB) (in German)

The leaflet has been produced by:

  • Ministère du Développement durable et des infrastructures
    • Département de l’Environnement
    • Administration de la nature et des forêts
  • Landesverband fir Beienzuucht
  • natur&ëmwelt
  • Musée national d’histoire naturelle, section d’écologie

Ceratophyllum submersum L., a new species for Luxembourg


Herbarium specimen MNHNL22119 at the Luxembourg National Museum of Natural History.

Ceratophyllum submersum L., commonly known as the soft hornwort, is a submerged, free-floating aquatic plant.

A very dense submerged population of the soft hornwort has been discovered in a pond near Sanem on 21st June 2015 by German botanists Jörg Zoldan and Annette Steinbach-Zoldan during a survey for the nature conservation organization SICONA-Ouest. The pond had been artificially created in 2010.

In November 2015 specimens from this population have been deposited in the herbarium of the Luxembourg National Museum of Natural History. 1

Ceratophyllum submersum, Flora Batava Vol. 19, 1893. Wikimedia Commons.

Ceratophyllum submersum, Flora Batava Vol. 19, 1893. Wikimedia Commons.


  1. Herbarium number MNHNL22119.

Unnoticed invasion of Highways by halophyte Atriplex micrantha Ledeb.

The annual halophyte Atriplex micrantha Ledeb. (syn.: A. heterosperma Bunge) was first spotted in Hellange on 14 October 2007. By 2015, eight years later, it had colonized the median strip of huge parts of the Luxembourg highway network.

Read more in the post about Atriplex micrantha.


Atriplex micrantha in the median strip of the A1 highway near Potaschberg, together with Senecio inaequidens. Curator Dr Christian Ries taking samples for the Museum herbarium. Photo: Dr Jim Meisch, 08.10.2015.