Inbreeding and cognitive impairment in animals.

This article reviews evidence on the cognitive costs of inbreeding in wild animals, highlighting that while physiological effects of inbreeding are well-documented, its impacts on cognition and behavior are less understood. Drawing from studies in humans, model organisms like Drosophila melanogaster, and wild populations (notably birds), the review indicates that inbreeding can impair learning, courtship behaviors (such as song), mating success, and parental care, potentially reducing reproductive fitness. The authors emphasize that cognitive abilities—critical for mate choice, foraging, and predator or parasite avoidance—may be particularly important in changing environments, where behavioral flexibility aids survival, yet data on these effects remain limited. They call for further research to clarify the mechanisms linking inbreeding to cognitive impairment and to assess how such deficits influence population persistence amid environmental change.