Report of the month - January


History: The nature reserve "Schlammwiss" was founded in 1982 by the foundation"Hellef fir Natur" (HFN). Afterwards the group "Letzeburger Natur- a Vullenschutzliga" (LNVL) founded the station "Schlammwiss". The station is leaded by the "centrale ornithologique Luxembourg" (COL), a part of the asbl. Natur & Emwelt. Due to the fact that Luxembourg doesn't have its own bird ringing central, we work in cooperation with Royal Belgian Instutitute of Natural Sciences. Therefore, we use rings from the Belgian Museum of Natural Sciences.


Location: The bird ringing station "Schlammwiss" is located in Luxembourg, between the communities Schuttrange & Munsbach. The nature reserve is part of the 375ha big Syrvalley and is an extremely important Natura 2000 zone. The reserve is periodicly flooded due to the Syr river, which is an important generator of biodiversity.


Research area: Around 30ha are used for researche, on a length of 1km and a width of 30-120m. The main area is covered by reeds and wetlands (20ha). Furthermore, the resarch area is subdivided and caracterized by an orchard, a forest, several ponds distributed throughout the reedbed and a purification plant (SIAS). The main techniques employed are mist nets and rail traps in order to realize population estimates (i.e. breeding population, migration, overwintering population) and survival estimates by Capture-Mark-Recapture. There are several projects running in the nature reserve and visitation are possible.


Summary of the ringing activity this month

In November, the bird ringing station "Schlammwiss" caught about 353 birds of 23 species. This number is subdivided in 138 E, 140 W and 215 K. One bird foreign origin has been caught.


The total amount of birds for the month January is higher (+151) than the average amount of birds caught in January at the station from 2001-2018 and higher (+10) than the number of last year. The graphic below shows the average amount of birds for each month during the years 2001-2018 in comparison of the numbers of this years, 2018 and the working time for this year at the station Schlammwiss.



E:  first capture of this individual

W:  recapture of an individual which was already captured this year

K:  individuals which were ringed one or more years ago or individuals with a foreign country or station


Top 5

1. CYACAE Blue Tit 108
2. PARMAJ Great Tit


3. EMBCIT Yellowhammer 41
4. PASDOM House Sparrow 37
5. FRICOE Chaffinch 19

Interesting birds captured:

  • 5 Dendrocopos major
  • 3 Certhia brachydactyla
  • 1 Fringilla montifringilla
  • 1 Bueto buteo
  • 1 Phylloscopus collybita abietinus


Distribution of the age:

Code Amount Definiton
C 3 older than four years
B 6 born four years ago
A 7 older than three years
9 4 born three years ago
8 10 older than two years
7 36 born two years ago
6 61 older than one year


born last year
4 88 age unkown, but not born this year
3 / born this year
2 10 age unknown
1 / nestling

Foreign birds that we controlled this year:

Month Species Country
January Cyanistes caeruleus France


The team of the bird ringing station Schlammwiss are mostly volunteers who did an excellent work this month!


 We say thank you for everyone who was helping this month!






In summary we spent around 25 hours during 6 days working at the station.



 We also welcome the visitors on our station:



All our sightings of this month are saved in


Compute total number of birds

Compute total number of observation

The weather information are offered by


Thank you!

Photos of this month

Extra story:



Thanks to the editiors of this report:

Charel Klein

Jim Schmitz: Photos ; Cédric Brodin: providing the data

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