Environmental fluctuations can influence animal behavior behavior and affect demographic parameters in a population. Under current rates of global change, these changes pose a challenge to individuals and threat the resilience of populations. In group living species, these efects can also affect the stability of social relationships that can negatively affect the survival and reproductor of the members of the groups.  In this project we aim to explore the mechanisms that allow group living species to be resilient to environmental disturbances and to disentangle how this affect population persistence.