At the moment, 15 evenly distributed research groups from 9 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 project are:
| Research group | Year joined | Country | Institution | Webpage |
| Research and Innovation Center | 2019 | Italy | Edmund Mach Foundation (CRI-FEM) | https://cri.fmach.it/en/ |
| Mammal Research Area | 2019 | Spain | Museu de Ciencies Naturals de Granollers (MCNG) | http://www.museugranollersciencies.org/en/ |
| Departament of Systematic Zoology | 2019 | Poland | Adam Mickiewicz University (UaM) | https://amu.edu.pl/ |
| Department of Forestry and Wildlife Management | 2019 | Norway | Inland Norway University of Applied Sciences (INN) | https://eng.inn.no/ |
| Department of Biosciences and Territory | 2019 | Italy | University of Molise (UniMOL) | https://www2.unimol.it/ |
| Institute of Terrestrial Ecosystem | 2019 | Italy | Italian National Research Council (CNR-IRET) | https://www.cnr.it/en |
| Department of Zoology, Fisheries, Hydrobiology and Apiculture and Department of Forest Ecology | 2019 | Czech Republic | Mendel University Brno (UniBrno) | https://mendelu.cz/en/ |
| Ethoikos Foundation | 2019 | Italy | Ethoikos Foundation | http://www.ethoikos.it/english.html |
| Department of Forest Ecology | 2019 | Poland | Forest Research Institute (IBL) | https://www.ibles.pl/en/web/guest/home |
| Department of Life Sciences and Systems Biology | 2019 | Italy | University of Turin (UniTO) | https://en.unito.it/ |
| Indipendent Research | 2021 | Italy | Indipendent Research | |
| Centre de Biologie pour la Gestion des Populations | 2021 | France | Institut National de la Recherche Aronomique (INRAE-CBGP) | https://www.inrae.fr/en |
| Institute of Public Health of Albania (ISHP) | 2021 | Albania | Institute of Public Health of Albania (ISHP) | https://www.ishp.gov.al/ |
| Clinic for Birds, Reptiles, Amphibians and Fish, Working Group for Wildlife Research | 2021 | Germany | Justus Liebig University Giessen (JLU) | https://www.uni-giessen.de/welcome |
| Department of Forest Sciences and Wildlife Sciences | 2021 | Germany | Georg-August University Goettingen (UniGoettingen) | https://www.uni-goettingen.de/en/1.html |
