My research lies at the interface of biology, statistical physics and applied mathematics. I use a collection of empirical, statistical and modelling methods to investigate, from experiments, the mechanisms responsible for the collective behaviours of animals, including insect societies or fish shoals. In particular, I have strong interests in collective motion, i.e. how social groups move together through space in a synchronised and coordinated manner.

pictures with moving animal groups
(A) Herd of wildebeest following a few leading zebras in the Masai Mara, Kenya. Photograph by T. R. Shankar Raman (under licence CC BY 3.0). (B) Milling barracudas at Sanganeb Reef, Sudan. Photograph by Robin Hughes (under licence CC BY-SA 2.0). (C) Flock of starling under predator threat (falcon at the top right) in Israel. Photograph by Oronbb (under licence CC BY-SA 3.0).

The patterns generated by collective motion in fish schools and bird flocks have fascinated humans for centuries, but only in recent decades have advances in modelling and data acquisition allowed collective motion to be investigated with scientific rigour. To research these complex systems is challenging for several reasons, the main one being that different individual rules can lead to the same collective behaviours. It is therefore difficult to infer and disentangle the individual rules from the collective behaviours themselves. The study of these systems with an integrative perspective requires a specific and interdisciplinary framework, especially combining modelling and empirical work at different scales.

Current and past positions

  • Sept 2023 - Dec 2025 Postdoctoral Research Fellow in Pawel Romanczuk's group at Humboldt University, Berlin, Germany.

  • Jun 2021 - Aug 2023 Postdoctoral Research Fellow in Richard Mann's group at the University of Leeds, UK.

  • Oct 2018 - Jan 2021 Postdoctoral Research Associate in Elva Robinson's group at the University of York, UK. I model the networks of trails in polydomous ants, in collaboration with Matina Donaldson-Matasci (Harvey Mudd College, USA) and Scott Powell (George Washington University, USA).

  • Jul - Oct 2018 Research assistant in Christos Ioannou's group at the University of Bristol, UK. I develop a pilot method encompassing a tracking process derived from optic flow techniques and a machine learning analysis in order to predict traits of large groups of fish as measured on video footage.


Animal Behaviour Live

I am one of the co-founders of the Animal Behaviour Live initiative, an international online platform promoting sustainable and inclusive events fully broadcasted online on YouTube. We aim to bring together researchers in animal behaviour from all over the world to discuss the latest research and question our academic practices.

We also maintain the Animal behaviour on Mastodon directory. This directory lists Mastodon accounts from animal behaviour scientists (Ethologists, Neuroethologists, Behavioural ecologists, Collective behaviour researchers alike), societies and institutions and offers an easy method to find new profiles and follow multiple accounts at once.

Data sets

The following data sets can be used to reproduce our results, for new research or for pedagogical purposes, for instance in courses aiming to engage students in scientific inquiry using real data. You can refer to the associated research article for details regarding the empirical set-up or the data treatment.


  • Dec 2021 Smart self-propelled particles: a framework to investigate spatially-embedded tasks combining learning and movement. Poster at the ASAB Winter virtual meeting, Hublet of the University of Hull, UK.
  • Oct 2021 From foraging trails to transport networks: how the quality-distance trade-off shapes network structure. Talk at the European IUSSI online symposium series, From genes to ecosystems: evolutionary biology of networks symposium.
  • Dec 2019 Morphogenesis of networks in polydomous ants. Talk at the IUSSI North-west European Section Winter meeting in the Natural History Museum of London.
  • Aug 2019 Morphogenesis of networks in polydomous ants. Talk at the ASAB 2019 Summer conference, Konstanz, Germany.
  • Jul 2019 Morphogenesis of networks in polydomous ants. Talk at the Mathematical Models in Ecology and Evolution 2019 conference, Lyon, France.
  • Apr 2019 Domino-like propagation of collective U-turns in fish school. Talk at the ASAB 2019 Easter meeting, York, UK.
  • Jul 2018 Article La danse organisée des bancs de poissons, published in the popular science magazine La Recherche #537 (July-August 2018). Written by Theraulaz G, Lecheval V and Sire C. To be read freely here in French and here in English.
  • Sept 2016 Workshop at the European Researchers’ Night of Toulouse, with a game of virtual reality for children called Panique à Fourmiville!. This game has been designed to explain the building mechanisms of ants, as described by Anaïs Khuong and her colleagues. Children (and adults) had to build the nest of ants before a disaster occurred. Project conducted with Rémi Gouttefarde with whom I developed the game from scratch in R.
  • Sept 2016 Dynamics of collective U-turns in fish schools: from empirical data to computational model. Talk at the 2016 Conference on Complex Systems, Amsterdam, The Netherlands.
  • Jun 2016 Dynamics of collective U-turns in fish schools: how information propagates within a group. Talk at the Collective Motion 2016 workshop, Uppsala, Sweden.
  • Aug 2013 Jost C, Solacroup A, Lecheval V, et al. The influence of gravity on termite displacement. Poster session presented at the International Union for the Study of Social Insects national section meeting, Paris.
Game Panique à Fourmiville!, at the European Researchers’ Night of Toulouse, with Rémi Gouttefarde thesis defense

Media coverage


  • Autumn 2016 64 hours as teaching assistant for the courses Quantitative ecology, Bachelor's programme in Ecology and Statistics, Master's programme in Ecology, Toulouse University, France
  • Winter 2015 Invited speaker in the course Advanced Self-organisation of social systems for master's students, Groningen University, The Netherlands
  • Autumn 2015 66 hours as teaching assistant for the courses Quantitative ecology, Bachelor's programme in Ecology and Statistics, Master's programme in Ecology, Toulouse University, France
  • Autumn 2014 64 hours as teaching assistant for the course Quantitative ecology, Bachelor's programme in Ecology, Toulouse University, France


  • 2014-2017 Double PhD degree at the Research Center of Animal Cognition, Toulouse University (France) and the Groningen Institute for Evolutionary Life Sciences, Groningen University (The Netherlands). This PhD project was supervised by Charlotte Hemelrijk (Groningen University, The Netherlands) and Guy Theraulaz (Toulouse University, France). My PhD thesis, entitled Experimental analysis and modelling of the behavioural interactions underlying the coordination of collective motion and the propagation of information in fish schools addressed the questions of coordination of motion and information transfer in groups of fish under internal or external perturbations. Download the thesis.

    Received the second prize of the 2018 National PhD Thesis Award in Complex Systems of the Complex Systems Institute of Paris, France

  • 2013-2014 Master programme in Computational Science, Uppsala University, Sweden. Master thesis entitled On collective bandit behaviour supervised by Kristiaan Pelckmans, in Uppsala, Sweden.
  • 2011-2013 Master's degree in Ecological Systems Modelling, Toulouse University, France. Master thesis entitled How do the support inclination and the temperature affect the ant motion? supervised by Jacques Gautrais in Toulouse, France.
  • 2010-2011 Bachelor of Science in Biology and Environment, Toulouse University, France
  • 2008-2010 2-year special undergraduate studies to prepare competitive entrance examinations for admission in engineering schools, École des Métiers de l'Environnement, Rennes, France