Spatial learning and lateralization in lizards

Spatial memory is a fundamental cognitive process that allows animals to navigate and interact with their environment effectively. While extensively studied in mammals and birds, the mechanisms underlying spatial cognition in reptiles remain less understood. In this study, we investigated spatial learning and the influence of behavioural lateralization in the common wall lizard (Podarcis muralis). We examined whether lizards could develop short-term spatial memory and whether lateralization affected their navigation in a complex maze. Experimental lizards received 3 days of training without reinforcement, while control lizards had no prior experience. We found that trained lizards learnt to navigate the maze rapidly, reaching a goal shelter faster and more reliably than controls. Additionally, strongly lateralized individuals took longer to reach the goal during training, but this did not impair escape performance once the route had been learned. Our study reports novel evidence on the role of lateralization during spatial exploration in lizards. Lateralization is hypothesized to enhance information processing, but our data suggest no benefit or cost of lateralization after a route was learnt. Our study contributes to a broader understanding of cognitive evolution across vertebrates and emphasizes the importance of reptiles as models for comparative cognition research.