Invasive alien species (IAS) are one of the main drivers of global biodiversity loss. The present study aims at performing a diagnostic analysis of the perceptions of Primary and Secondary school students about causes, consequences and solutions of the presence of IAS in the environment. The influence of educational level, knowledge of the meaning of IAS and familiarity with exotic pets on students' perceptions is analysed. The instrument for data sampling consisted of a questionnaire, contextualised in the case of the presence of monk parakeet ("Myiopsitta monachus") in their town. Results show differences in students' perceptions among educational levels. Primary students predominantly present a social view of the issue, while Secondary students highlight ecological impacts. Reticence to monk parakeet removal from the environment is widespread. Familiarity with exotic pets hinders the recognition of human responsibility in causing the problem, the option for preventive solutions and the personal contribution to the solution. Knowledge of the meaning of IAS improves the recognition of causes and impacts, and also increases the preference for preventive solutions. Surprisingly, this factor does not change the willingness to personally contribute to solving the problem. Educational implications related to the teaching of IAS issues are discussed.