At the moment, 10 evenly distributed research groups from 5 countries joined the EUROSMALLMAMMALS!
The project is open to further contributions and affiliations.
The Institutes that contribute with data and specific expertise on European small mammals analyses and ecology are:
| Research group | Year joined | Country | Institution | Webpage |
| CRI-FEM | 2019 | Italy | Edmund Mach Foundation (FEM) | http://www.fmach.it/eng/CRI |
| Mammal Research Area | 2019 | Spain | Museu de Ciencies Naturals de Granollers | http://www.museugranollersciencies.org/en/ |
| UAM | 2019 | Poland | Adam Mickiewicz University (UAM) | https://amu.edu.pl/ |
| INN | 2019 | Norway | Inland Norway University of Applied Sciences (INN) | https://eng.inn.no/ |
| INRAE-CBGP | 2019 | France | French National Research Institute for Agriculture, Food and Environment (INRAE) | https://www.inrae.fr/en |
| UniMol | 2019 | Italy | University of Molise (UniMol) | https://www2.unimol.it/ |
| CNR-IRET | 2019 | Italy | Italian National Research Council (CNR) | https://www.cnr.it/en |
| MENDELU | 2019 | Czech Republic | Mendel University (MendelU) | https://mendelu.cz/en/ |
| Ethoikos | 2019 | Italy | Fondazione Ethoikos | http://www.ethoikos.it/english.html |
| IBL | 2019 | Poland | Forest Research Institute (IBL) | https://www.ibles.pl/en/web/guest/home |
| UniTO | 2019 | Italy | University of Turin (UniTO) | https://en.unito.it/ |
| UniSLU-Ume� | 2019 | Sweden | Swedish University of Agricultural Sciences (SLU) | https://www.slu.se/en/ |
| JKI | 2019 | Germany | Federal Research Centre for Cultivated Plants (JKI) | https://www.julius-kuehn.de/en/ |
| UniBO | 2020 | Italy | University of Bologna (UniBO) | https://www.unibo.it/en/homepage |