Brief summary
The extinction risk of species is globally monitored by the IUCN Red List (RL). Despite the goal to update extinction risk assessments at least every 10 years, over 21,000 species (ca. 18% of those assessed) currently have outdated assessments. The resources needed to keep assessments up to date present a clear sustainability challenge. Furthermore, even a 10-year reassessment interval is too long to allow timely conservation interventions in many cases, and the application of RL criteria often suffer from inconsistencies across different groups. Several authors have proposed automated methods to conduct preliminary screenings to guide reassessment of species, considering species intrinsic vulnerability (inferred from their traits and other factors), historical trends, and satellite-derived imagery combined with macroecological modelling. So far, however, these approaches have remained largely academic exercises, and have rarely been incorporated in the official RL reassessment routines.
By bringing together RL practitioners and ecological modellers, we developed an innovative, rapid and consistent framework for performing RL assessments, which is now available through the sRedList platform.

The project was funded by iDiv (https://www.idiv.de/en/sredlist.html) ran between the 2021 and the 2024. It also received financial support from Re:wild and Sapienza University. LifeWatch Italy contributed to develop the platform, and it currently maintains it together with the IUCN Red List.
PIs: Luca Santini, Moreno Di Marco
sRedList working group:
Victor Cazalis (iDiv, Germany)
Carsten Meyer (iDiv, Germany)
Alexander Zizka (iDiv, Germany)
Ana Benitez-Lopez (Doñana Biological Station, Spain)
Aafke Schipper (Radboud University, The Netherlands)
Bruce Young (NatureServe, US), Carlo Rondinini (Sapienza University, Italy)
Manuela Gonzalez-Suarez (Reading University, UK)
Nathalie Pettorelli (Zoological Society of London, UK)
Resit H. Akcakaya (Stony Brook University, US)
Samantha Hill (UN Environment World Conservation Monitoring Centre, UK)
Stuart Butchart (Birdlife International, UK)
Thomas Brooks (IUCN, Switzerland)
Extended network:
Piero Visconti (IIASA, Austria)
Monika Bohm (ZSL, UK)
Mike Hoffmann (ZSL, UK)
Michela Pacifici (Sapienza University, Italy)
Steven Bachman (Kew Gardens, UK)
Pedro Cardoso (Finnish Museum of Natural History, Finland)
Publications
Cazalis V., Di Marco M., Zizka, A., Butchart, S.H.M., González-Suárez M., Böhm M., Bachman S.P., Hoffmann M., Rosati I., De Leo F., Jung M., Bénitez-López A., Claustizner V., Cardoso P., Brooks T.M., Mancini G., Lucas P.M., Young B.E., Akcakaya H.R., Schipper A.M., Hilton-Taylor C., Pacifici M., Meyer C., Santini L. 2024. Accelerating and standardising IUCN Red List assessments with sRedList. Biological Conservation 298: 110761
Lucas P.M., Di Marco M., Cazalis V., Luedtke J., Neam K., Brown M.H., Langhammer P., Mancini G., Santini L. 2024. Using comparative extinction risk analysis to prioritize the Red List reassessments of amphibians. Conservation Biology, e14316
Henry, E. G., Santini L., Butchart S.H.M., González‐Suárez M., Lucas P.M., Benítez-López A., Mancini G., Jung M., Cardoso P., Zizka A., Meyer C., Akçakaya H.R., Berryman A., Cazalis V., Di Marco M. 2023. Modelling the probability of meeting IUCN Red List criteria to support reassessments. Global Change Biology, doi: 10.1111/gcb.171
Mancini G., Santini L., Cazalis V., Akcakaya R., Lucas P., Brooks T., Foden W., Di Marco M. 2023. A standard approach for including climate change responses in IUCN Red List assessments. Conseration Biology, doi: 10.1111/cobi.14227
Cazalis V., Santini L., Pablo L.M., Gonzalez-Suarez M., Hoffmann M., Benítez-López A., Pacifici M., Schipper A., Böhm M., Zizka A., Clausnitzer V., Meyer C., Jung M., Butchart S., Cardoso P., Mancini G., Akçakaya R.H., Young B., Patoine G., Di Marco M. 2023. Prioritizing the reassessment of Data Deficient species in the Red List. Conservation Biology 37(6):e14139
Cazalis V., Di Marco M., Butchart, S.H.M., Akçakaya H.R., González‐Suárez M, Meyer C., Clausnitzer V., Böhm M., Zizka A., Cardoso A., Schipper A.M., Bachman S.P., Young B.E., Hoffmann M., Benítez-López A., Lucas P.M., Pettorelli N., Patoine G., Pacifici M., Jörger-Hickfang T., Brooks T.M., Rondinini C., Hill S.L.L., Visconti P., Santini L. (2022) Bridging the research-implementation gap in IUCN Red List assessments. Trends in Ecology and Evolution 37(4): 359-370