Society and regional strategies 3 min

Can school children support ecological research? First lessons from the “Oak Bodyguards” research project

PRESS RELEASE - Multiple research projects have recently included a citizen science component, encouraging the participation of citizens, amateurs and professionals, students of all ages, the general public, etc. Within the framework of the “Oak Bodyguards” project, which began in 2018, INRAE researchers have asked the help of middle and high school students from different European countries—from Portugal to Finland—to study oak resistance to insect herbivores along climatic gradient. This study focuses on one essential question: how reliable is the data collected by students in projects such as this one? Their first lessons were published on 18 Mars 2020 in Citizen Science: Theory and Practices. Researchers discovered that data provided by both untrained professional scientists and schoolchildren were biased, but that their bias could be corrected by adopting appropriate mitigation procedures. Once the bias has been identified and corrected, schoolchildren’s data can be taken into consideration and used to support new scientific research.

Published on 17 March 2020

illustration Can school children support ecological research? First lessons from the “Oak Bodyguards” research project

In the “Oak Bodyguards” project, students and scientists from 17 European countries placed more than 7 000 artificial clay caterpillars on oak trees, following a detailed protocol, in order to observe the marks left by their predators. They sent their observations to INRAE researchers studying the effects of climate on tree defence mechanisms. The young participants followed the exact same procedure used by all the professional scientists involved in the project, specialized in ecology or not.

Two objectives motivated researchers to carry out the project: the first was to obtain samples and data from the entire European continent; the second, to start a dialogue with schoolchildren on the scientific approach and the implementation of an experimental protocol, showing them how their work can help scientists with their research.

© INRAE – Alain Girard

To estimate the impact of predators on the studied oaks, the participants installed clay dummies on the trees—the same size and shape as real caterpillars. The predators took the bait! They attacked the dummies as if they were real prey, leaving marks of their beak, teeth, or mandibles. The next step was simply to count the marks. In 2018 and 2019, researchers received from the participants over 7 000 artificial caterpillars—that they had made, placed, and recuperated after a month—and close to 9 000 leaves from around 120 oaks. The project has now been extended for three additional years.

Data collected by students and untrained scientists show similar results

Researchers analysed all the samples, both the marks left by predators on the dummies and the damage caused by herbivores on the leaves. They also reread the estimations from the schoolchildren and untrained scientists, all of whom had followed the same protocol. The results published now refer to the quality of the data collected. Researchers from INRAE followed the same protocol to contrast the data collected by students and untrained scientists. Compared with the specialists, students and untrained scientists overestimated both the predation rates and the damage caused by herbivores on the leaves. Schoolchildren were less precise than the untrained scientists in identifying attack marks on the dummy. Conversely, they were more accurate in estimating the damage on the leaves. Their raw data cannot be used as is; a correction is needed according to the reading bias observed. However, once the bias has been taken into account, even the data gathered by schoolchildren can be analysed and used to produce results.

Beyond these conclusions, scientific literature indicates that participating in citizen science research helps schoolchildren gain confidence and motivation, and encourages a positive attitude towards science. Other tasks such as collecting and formatting data, following a protocol, or engaging in discussions with researchers are also crucial to the young participants’ scientific learning experience. The activities carried out as part of citizen science programmes contribute significantly to gaining common knowledge on ecology—and science in general—for researchers and students alike.

Learn more about the “Oak Bodyguards” project

To learn more about the scientific context and the protocols followed in the project, and to find valuable information on trophic cascade, herbivores’ enemies, plant defence and damage caused by insects in the context of climate change, visit the project’s website:

Chiffres du projet : 4760 chenilles, 8620 feuilles, 119 chenes, 12 pays, 19 partenaires, 35 écoles


The scientific project has been extended until 2022, integrating more and more schools throughout Europe.





A comic book aiming to teach children about the participatory approach used in the project can be downloaded for free and is available in English, French, German, or Spanish:

A video tracing the steps of the schoolchildren that participated in the project is available (in French) at:






Castagneyrol, B., Valdés-Correcher, E., Bourdin, A., Barbaro, L., Bouriaud, O., Branco, M., Centenaro, G., Csóka, G., Duduman, M.-L., Dulaurent, A.-M., Eötvös, C.B., Faticov, M., Ferrante, M., Fürjes-Mikó, Á., Galmán, A., Gossner, M.M., Harvey, D., Howe, A.G., Kaennel-Dobbertin, M., Koricheva, J., Löveï, G.L., Lupaștean, D., Milanović, S., Mrazova, A., Opgennoorth, L., Pitkänen, J.-M., Popović, M., Roslin, T.V., Scherer-Lorenzen, M., Sam, K., Tahadlová, M., Thomas, R. and Tack, A.J.M., 2020. Can School Children Support Ecological Research? Lessons from the Oak Bodyguard Citizen Science Project. Citizen Science: Theory and Practice, 5(1), p.10. DOI:


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Society and regional strategies

INRA at the 2019 Paris International Agricultural Show

PRESS RELEASE - At the 56th Paris International Agricultural Show (SIA), INRA will be placing "The secret life of plants and animals” in the spotlight and will present the forms of communication and interactions which exist among plants, animals and microorganisms. Its stand will also feature a recruitment hub, where the institute’s research areas and employment opportunities will be presented.

03 April 2020

Climate change and risks

Two publications present the results of FACCE-JPI

The Joint Programming Initiative on Agriculture, Food Security and Climate Change (FACCE-JPI) has published its new brochure and a flyer on soil management in the context of climate change mitigation. The brochure presents the achievements and future actions of FACCE-JPI and includes several key interviews. The flyer highlights some of the research projects that are part of the 'FACCE-JPI Multi-Partner Call on Agricultural Greenhouse Gas Research'. Both documents were presented at the International Conference on Agricultural GHG Emissions and Food Security organised by GRA and FACCE-JPI in Berlin (10-13 September 2018).

12 December 2019