The Ministry of Health informs that a population of the invasive Asian tiger mosquito Aedes albopictus has been detected at two locations in the territory of the Commune of Roeser. This first appearance of the tiger mosquito in the Grand Duchy has been confirmed by an international expert in the field. According to current information, this is a limited phenomenon. The tiger mosquito does not move very far and usually does not travel more than a hundred metres from its birthplace.
In the next few days, the Luxembourg authorities, with the support of an expert, will assess the situation, as well as set up a prevention plan and a surveillance and eradication system. The use of insecticides is currently under consideration. However, eradication would be mainly through the elimination of potential habitats.
The first observation of Lysichiton americanus in Luxembourg has been documented by C. Wolff via iNaturalist on 31st May 2022 and was confirmed by M. Oly on 2nd June in the Mamer valley close to Kopstal.
Since 2021-07-14, an alert system concerning iNaturalist neobiota observations from Luxembourg has been operational. Paul Braun, digital curator at the Luxembourg National Museum of Natural History, has implemented a Python code executed every day at 12:00 CET (= 13:00 local time) which sends an email alert message to key persons in charge of neobiota early detection and surveillance in Luxembourg. Independently from their quality grade, all observations since the day before 00:00 CET until the current day 12:00 CET are compiled and sent to , and thereafter dispatched to a selection of key persons. We chose 12:00 CET to enable a rapid response in case of observations of important species occur on the current morning. Unfortunately, the iNaturalist API does not give the option to choose precise periods for data extraction, which results in an overlap of the periods covered by the alert messages.
If interested, other member states of the European Union are welcome to obtain the code in order to set up a similar alert system for their country. The contact email address is .
Recommendations to iNaturalist: it would be useful to implement the following in future versions of the API:
enable the selection of a specific set of fields needed for a query (currently only complete data sets can be selected, which causes transfer of high data volumes and has a negative impact on climate and environment);
enable precise periods for observation queries.
Example of an iNaturalist alert message
iNaturalist Neobiota Luxembourg update 2021-07-26
9 neobiota species occurrence records have been updated or added in the Neobiota Luxembourg project on iNaturalist.LU since: 2021-07-25
Please help validate neobiota species observations on iNaturalist.LU here.
The Neobiota Luxembourg project on iNaturalist.LU can be found here.
The data in this mail was obtained at 13h00 2021-07-26 using the following iNaturalist API link:
An alert system for neobiota observations recorded in the national database on natural heritage Recorder-Lux has been operational since 2019. It triggers an alarm message as soon as an observation is entered in data.mnhn.lu or uploaded to the Recorder-Lux database. It was implemented by Armand Turpel.
Example of a Recorder-Lux alert message
Here are your latest messages from MNHN Indicia Warehouse
Thus, most neobiota observations from Luxembourg will trigger an alarm in a timely manner. However, a small gap remains: the observations of invasive alien bird species via the database of the Centrale Ornithologique du Luxembourg (COL) do not yet trigger an alarm in a timely manner. This currently concerns the following 4 bird species: Mandarin duck (Aix galericulata), Egyptian goose (Alopochen aegyptiaca), Canada goose (Branta canadensis) and Rose-ringed parakeet (Psittacula krameri).
Posted by C. Ries.
Page content last updated on 2021-08-16. Last proofread by Caroline Grounds on 2021-08-16.
On Sunday 13 June 2021, a citizen of Rumelange discovered an initial nest of an Asian black hornet (Vespa velutina nigrithorax) and reported it to the Natural History Museum. The initial nests of the native Eurasian hornet (Vespa crabro) look very similar.
Note: This occurrence/detection of an Invasive Alien Species of Union concern named Vespa velutina nigrithorax has been notified on 16 June 2021 by Luxembourg, pursuant to Article 16(2) of R.1143/2014. The EASIN Notification System automatically warns (all the other) European Member States whenever the occurrence/detection of an IAS of Union concern is notified.
Since the beginning of September 2020, the first sightings of the Yellow-legged Asian Hornet (Vespa velutina nigrithorax) have been reported in Luxembourg. To date, its presence has been noted in Junglinster, Ingeldorf, Esch-sur-Alzette, Schifflange and Beckerich. Originally from South-East Asia, this hornet was introduced to France around 2004, and has since gradually colonised much of Europe, from Portugal to northern Germany.
The risk of stinging remains negligible as long as one does not approach its nest. The Yellow-legged Asian Hornet resembles the European Hornet (Vespa crabro), which is indigenous to Europe.
For more information about the Yellow-legged Asian Hornet and especially the characteristics allowing its identification, do not hesitate to consult the links below.
At the beginning of September 2020, freshwater jellyfish were spotted in the Upper Sûre Lake. Photographs of this jellyfish were sent by divers from the CGDIS Frogmen Group to the Water Management Administration (AGE) and the Nature and Forestry Administration (ANF). This observation made it possible to confirm the presence of the Craspedacusta sowerbii jellyfish in the Upper Sûre Lake.
It is true that the term “jellyfish” is reminiscent of marine species with a stinging nature, which can trigger painful skin reactions, similar to a burn, on direct contact with the animal. The freshwater jellyfish, on the other hand, is a harmless relative. Although it belongs to the group of cnidarians, it is completely harmless to humans.
Originally from Asia, the freshwater jellyfish has spread to other parts of the world mainly due to the introduction of aquatic plants and fish. This invasive alien species is no larger than 25 mm in diameter and prefers calm, stagnant waters that warm up considerably in summer.
As this jellyfish requires temperatures often above 20°C over a long period of time, its appearance takes place from July to October with a peak observed from the end of August to the beginning of September.
It should also be noted that these jellyfish prefer clean water. In the evening, they often come to the surface of the water and can be observed there. They can also be admired when diving at greater depths during the day. These jellyfish have also been reported in other surrounding areas. It is very likely that their proliferation will continue as the climate warms.
The problem of the appearance of blue-green algae (cyanobacteria), which is a real concern in many respects for the Upper Sûre Lake, is a phenomenon totally independent of the appearance of the freshwater jellyfish observed and described in this press release.
If you spot any jellyfish, you can report them at the following address: .
In early spring 2020 the Department for the Environment of the Luxembourg Ministry for environment, climate and sustainable development edited leaflets in German and French about Fallopia japonica and Impatiens glandulifera, in co-operation with the National Museum of Natural History and efor-ersa ingénieurs-conseils. They can be downloaded here in PDF format (~ 4 MB each).
The Invasive Alien Species in Europe app enables the general public (amateurs and professionals) to receive and share information about Invasive Alien Species (IAS) in Europe. It provides details about 66 different IAS that are considered to be of interest to the complete European Union. Users can record pictures of possible Invasive Alien Species together with complementary information about their observation.
All important information concerning dates, registration, booking, fees, etc. are now available at the NEOBIOTA 2020 website. The abstract submission process will start by the end of February and last until March 31st, 2020.
Page content last updated on 2020-03-05. Last proofread by Caroline Grounds on 2020-03-05.