What is a marteloscope?

Marteloscopes are delimited forest areas within which all trees are measured, and their ecological and economic value recorded. They can serve as training sites for foresters, forest owners, students, school pupils and the interested public. In a marteloscope, you can “become a forester” by conducting field exercises, either retaining or removing trees according to various criteria.

Tree selection software

The virtual selection of individual trees in a marteloscope is done using a software specifically developed for this purpose. It runs on mobile devices such as tablets or mobile phones. Selection results are made available to the participants at the end of an exercise, which then allow discussions to take place directly in the forest. To carry out such virtual tree selections, data was recorded for each tree (e.g. diameter, height, wood volume, habitat structures, wood qualities) and stored in the tablet software.

What are tree microhabitats?

Tree microhabitats are, for instance, lichens and fungi on the bark, or woodpecker cavities, which can be visibly demarcated habitat structures. They are partly used by highly specialised species or species communities at least during part of their life cycle and are thus important places for shelter, breeding, hibernation, or foraging. There are surely microhabitats in the marteloscope you are visiting – take a look around!

Download Tree Microhabitat Catalogue

English German Slovenian

Our marteloscope sites

Smarna gora near Ljubljana (Slovenia)

The educational marteloscope on the slope of Šmarna Gora, a 0.2-hectare forest area, is tailored to educate schoolchildren and other visitors interested in biodiversity and forest ecosystem services. They can learn more about the numbered trees using the web app and other learning materials that can be accessed via the QR code.

The marteloscope was developed in collaboration with experts from the Šmartno pod Šmarno gora Primary School, the Slovenian Forest Institute, the Slovenian Forest Service and the Faculty of Education of the University of Ljubljana. We appreciate the support of the forest owner Marko Bitenc.

See photosphere

Download factsheets

English Slovenian


Gregor Torkar, University of Ljubljana, Faculty of Education, Kardeljeva ploščad 16, SI-1000 Ljubljana

Jägerhäuschen in the Kottenforst near Bonn (Germany)

The Federal State of North Rhine-Westphalia (NRW) owns 13 %, or 113,000 hectares, of the total forest area in NRW. The State Forest Administration Wald und Holz NRW is responsible for managing these forests and in addition provides its expertise and assistance to private forest owners. The regional forest district office Regionalforstamt Rhein-Sieg-Erft, manages about 60,000 hectares of forest in the Greater Cologne/Bonn area. Of these, approximately 22,000 hectares are state-owned.

There are several well-known forests in the area including the Königsforst, the Siebengebirge and the Kottenforst. They all vary considerably in their site conditions. The Kottenforst is located in the west and southwest of the former German capital of Bonn. The local state forests are a part of the forest districts Kottenforst and Buschhoven.

The Kottenforst is dominated by old oak stands. They are embedded in a concentric arranged network of forest paths and roads which served in the past for electoral par force hunting. Jägerhäuschen (“hunter’s cottage”) is a relic within these former hunting grounds. It was built around 1750 as a relay-station where hold horses were ready to replace those exhausted.

Download factsheets

English German

Download field guides

English German

News on marteloscopes

New video: Marteloscopes as outdoor classrooms

New video: Marteloscopes as outdoor classrooms

Mar 21, 2024
Outdoor classes are a great way to get students excited about forests. But did you know teachers can use tablets and new media in forestry training sites too? Watch the video and learn all about the training sessions our students had with experts from the European Forest Institute in a “marteloscope” site in Bonn, Germany.
MULTIPLIERS marteloscope

School Marteloscope: Workshop for sixth grade pupils in Slovenia

Mar 7, 2024
By Žan Rode, Hana Rožman, Andreja Dolenec and Gregor Torkar On Friday, January 12, 2024, prospective teachers from the Faculty of Education at the University of Ljubljana held four different workshops for sixth-grade pupils at the primary school Šmartno pod Šmarno gora. The workshops were part of a practical test of the knowledge acquired in …
Same trees, different perspectives: using a marteloscope to present forests in a new light

Same trees, different perspectives: using a marteloscope to present forests in a new light

Feb 22, 2024
What do you see when you look at a forest? The first, obvious answer could be “trees”, but the more nuanced reality is that forests have different meanings and values to different people. Trees provide important habitats to animals, such as cavities for bats to sleep in and branches for birds to build their nests …
How can marteloscopes contribute to forest and science education? An interview with Lisa Hafer, WaldHaus Freiburg

How can marteloscopes contribute to forest and science education? An interview with Lisa Hafer, WaldHaus Freiburg

Apr 27, 2022
One of the main goals of MULTIPLIERS is to empower students through science education to participate in decision-making matters that affect their lives. The project will develop learning activities with real-life challenges as starting points, giving students access to authentic settings to make science classes more concrete and engaging. Activities will be based on six …