This research focuses on exploring the intergroup relationship between migrants and natives through their use of public spaces. To comprehend these intergroup dynamics in a place, two case studies were analysed: an urban context in Belgium and Portugal. Through a systematic observation method, behavioural maps were collected to comprehend the distribution of natives and migrants in those areas, at different times of the day and their types of behaviours. Results showed that in the Belgian urban area, there is a sharing of the public space but with different behaviours, while in Portugal, we found a distribution of apparently migrant groups in space. In sum, the systematic observation of people in the public space provides a first assessment of the intergroup relations between migrants and natives in the urban context. It presents evidence to plan and design public space, promote social cohesion and comprehend what elements are relevant to maintain and adjust these groups’ place identity.